Encycolorpedia

‎#d2b7b7 קוד צבע הקסדצימלי

#d2b7b7 Paint Chipקוד צבע הקסדצימלי ‎#d2b7b7 הוא בהירות גוון של אדום. במודל הצבעים של RGB ‎#d2b7b7 מורכב מ 82.35% אדום, 71.76% ירוק ו 71.76% כחול. בחלל הצבע HSL ‎#d2b7b7 יש גוון של 0° (מעלות), 23% רוויה ו 77% בהירות. לצבע זה יש אורך גל משוער של 611.37 nm.

וריאציות צבע

צבעים קשורים

ערכות צבעים

הורד: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

צבעים מונוכרומטיים

  1. ‎#ad9393
  2. ‎#b99f9f
  3. ‎#c6abab
  4. ‎#d2b7b7
  5. ‎#dfc3c3
  6. ‎#ebd0d0
  7. ‎#f8dcdc

גוונים וצללים

‎#d2b7b7 להלבין

  1. ‎#d2b7b7
  2. ‎#dac3c3
  3. ‎#e1cfce
  4. ‎#e9dbda
  5. ‎#f0e7e6
  6. ‎#f8f3f3
  7. ‎#ffffff / #fff

‎#d2b7b7 להשחיר

  1. ‎#d2b7b7
  2. ‎#ac9696
  3. ‎#877676
  4. ‎#635858
  5. ‎#423b3b
  6. ‎#242020
  7. ‎#000000 / #000

צבעים

צבעים דומים

  1. Peintures MF

    1. ★ Riche cachemire
      ‎#d3b7b7
      ΔE = 0.280 / LRV ≈ 51.1%
    2. Brume d'opéra
      ‎#ccbab6
      ΔE = 3.072 / LRV ≈ 51.3%
  2. Natural Color System / NCS

    1. ★ S 2005-R20B
      ‎#d1b6b6
      ΔE = 0.364 / LRV ≈ 50.4%
    2. ★ S 2005-R10B
      ‎#d3bab6
      ΔE = 2.081 / LRV ≈ 52.3%
  3. Sto

    1. ★ 33335
      ‎#d0b8b8
      ΔE = 0.809 / LRV ≈ 51.2%
    2. 33222
      ‎#cbacab
      ΔE = 3.903 / LRV ≈ 45.1%
  4. Duron

    1. ★ Insightful Rose
      ‎#d5b7b7
      ΔE = 0.843 / LRV ≈ 51.4%
    2. Temperate Taupe
      ‎#c9b6b0
      ΔE = 3.764 / LRV ≈ 49.0%
  5. Benjamin Moore

    1. ★ Victoriana / 1263
      ‎#d3b5b4
      ΔE = 1.072 / LRV ≈ 50.2%
    2. Cedar Ridge / 1233
      ‎#ceb6ab
      ΔE = 5.185 / LRV ≈ 49.5%
  6. Crown Diamond

    1. ★ 7204-31 Pink Dawn
      ‎#d2b9bb
      ΔE = 1.259 / LRV ≈ 52.0%
    2. ★ 7210-31 Fresco Pink
      ‎#d5bab6
      ΔE = 2.082 / LRV ≈ 52.6%
  7. CIL

    1. ★ Restoration Rose
      ‎#d6b7b9
      ΔE = 1.414 / LRV ≈ 51.7%
    2. Winter Mauve
      ‎#d4c1c2
      ΔE = 3.712 / LRV ≈ 56.0%
  8. Pratt & Lambert

    1. ★ Grecian Rose 32-4
      ‎#d5bbbc
      ΔE = 1.500 / LRV ≈ 53.3%
    2. Mithras 31-31
      ‎#cebec1
      ΔE = 3.750 / LRV ≈ 53.8%
  9. Sico

    1. ★ 6039-31 Muscat Rose
      ‎#d2bbbc
      ΔE = 1.651 / LRV ≈ 52.9%
    2. 6083-31 Old Picture Rose
      ‎#d6bcb6
      ΔE = 3.177 / LRV ≈ 53.6%
  10. Nippon Paint

    1. ★ Mountain Haze / NP N 1894 P
      ‎#ceb8ba
      ΔE = 1.674 / LRV ≈ 50.9%
    2. Tinted Glass / NP N 1909 P
      ‎#c9b7b3
      ΔE = 3.181 / LRV ≈ 49.5%
  11. Cloverdale Paint

    1. ★ Spring Thing / 8697
      ‎#d5b6b9
      ΔE = 1.676 / LRV ≈ 51.1%
    2. Andreas Anticipation / 8714
      ‎#dabec3
      ΔE = 3.575 / LRV ≈ 55.7%
  12. ICI Paints

    1. ★ Winter Mauve 70RR 57/070
      ‎#d1bbbc
      ΔE = 1.786 / LRV ≈ 52.7%
    2. 3079 Rose Bouquet 50RR 51/109
      ‎#ceb0b6
      ΔE = 3.522 / LRV ≈ 47.6%
  13. Sikkens

    1. ★ B2.05.70
      ‎#cbb4b3
      ΔE = 1.854 / LRV ≈ 48.6%
    2. Z9.06.69
      ‎#d2b7bd
      ΔE = 2.765 / LRV ≈ 51.2%
  14. Evonik-Degussa

    1. ★ 4161P Mountain Haze
      ‎#cbb6b7
      ΔE = 1.884 / LRV ≈ 49.6%
    2. 4181P Beige Gray
      ‎#c4b5af
      ΔE = 4.770 / LRV ≈ 47.9%
  15. Resene

    1. ★ Kidman R80-012-017
      ‎#ccb7b9
      ΔE = 1.954 / LRV ≈ 50.2%
    2. Oyster Pink R81-022-033
      ‎#d4b5b0
      ΔE = 2.595 / LRV ≈ 50.2%
  16. Behr

    1. ★ Raspberry RAH-44
      ‎#d7babd
      ΔE = 1.962 / LRV ≈ 53.2%
    2. Castilian Pink S170-3
      ‎#d4b3ab
      ΔE = 4.148 / LRV ≈ 49.2%
  17. Porter Paints

    1. ★ Rose Stain / 536-4
      ‎#d5b6ba
      ΔE = 2.042 / LRV ≈ 51.1%
    2. Paradise Nut / 429-4
      ‎#d6b5ad
      ΔE = 3.999 / LRV ≈ 50.4%
  18. Zoffany

    1. ★ Faded Rose
      ‎#d1bcbc
      ΔE = 2.071 / LRV ≈ 53.2%
  19. Brighto Paints

    1. ★ 4-50-3 Cinnamon Stone
      ‎#d1bcbb
      ΔE = 2.097 / LRV ≈ 53.1%
    2. 4-2-3 Cherish
      ‎#dcb8b1
      ΔE = 4.126 / LRV ≈ 52.7%
  20. Nerolac

    1. ★ Dusty Beige - 2192
      ‎#d8b7ba
      ΔE = 2.110 / LRV ≈ 52.0%
    2. Necco - 2857
      ‎#cebbb7
      ΔE = 2.929 / LRV ≈ 52.1%
  21. Ralph Lauren

    1. ★ Venetian / RLVM209
      ‎#d7bdbc
      ΔE = 2.135 / LRV ≈ 54.5%
    2. Early Morning / RLVM218
      ‎#cfb7b0
      ΔE = 3.358 / LRV ≈ 50.3%
  22. Tikkurila

    1. ★ 4873
      ‎#d1bcbd
      ΔE = 2.157 / LRV ≈ 53.2%
    2. H478
      ‎#c7b6b6
      ΔE = 2.910 / LRV ≈ 49.0%
  23. Asian Paints

    1. Mountain Retreat / 8690
      ‎#d8bdbb
      ΔE = 2.316 / LRV ≈ 54.6%
    2. Coastal Wood / 9546
      ‎#d9c0b8
      ΔE = 4.689 / LRV ≈ 55.9%
  24. Brillux

    1. 33.09.13
      ‎#d2bcbf
      ΔE = 2.488 / LRV ≈ 53.4%
    2. 33.06.12
      ‎#ccc1c1
      ΔE = 4.804 / LRV ≈ 54.8%
  25. Sigma

    1. Warm Red / S 2020-R10B
      ‎#cdb0b2
      ΔE = 2.555 / LRV ≈ 47.2%
    2. Warm Red / S 2020-R
      ‎#ceaeab
      ΔE = 3.543 / LRV ≈ 46.3%
  26. Dutch Boy

    1. Lilac Bisque
      ‎#d1bdbb
      ΔE = 2.585 / LRV ≈ 53.5%
    2. Twilight Mauve
      ‎#cbb8c0
      ΔE = 4.524 / LRV ≈ 50.8%
  27. Berger

    1. Chambord Charm / 8690
      ‎#d9bebc
      ΔE = 2.652 / LRV ≈ 55.2%
    2. Shrub Rose / 8713
      ‎#d6b3ba
      ΔE = 3.697 / LRV ≈ 50.1%
  28. Vista Paint

    1. Chambord Charm
      ‎#d9bebc
      ΔE = 2.652 / LRV ≈ 55.2%
    2. Shrub Rose
      ‎#d6b3ba
      ΔE = 3.697 / LRV ≈ 50.1%
  29. Rodda Paint

    1. Demetrio 8689
      ‎#cdb0ae
      ΔE = 2.673 / LRV ≈ 47.1%
    2. Shrub Rose 8713
      ‎#d5b8be
      ΔE = 2.832 / LRV ≈ 52.1%
  30. Devoe Paint

    1. Soft Wine / 30RR 49/067
      ‎#c7b4b3
      ΔE = 2.810 / LRV ≈ 48.0%
    2. Ballerina Slipper / 10RR 56/121
      ‎#dbbdc3
      ΔE = 3.791 / LRV ≈ 55.4%
  31. Dulux Australia

    1. Mauve Pink / G37
      ‎#dbbdc0
      ΔE = 2.938 / LRV ≈ 55.3%
    2. Pink / G38
      ‎#deb6b2
      ΔE = 4.074 / LRV ≈ 52.2%
  32. Plascon

    1. Lacy Oatmeal O2-E2-3
      ‎#c8b8b8
      ΔE = 2.965 / LRV ≈ 50.0%
    2. Careless Whisper R7-D2-2
      ‎#c4acb0
      ΔE = 4.672 / LRV ≈ 44.4%
  33. PPG Pittsburgh Paints

    1. Adger's Wharf Chs-4
      ‎#cebdbd
      ΔE = 2.975 / LRV ≈ 53.2%
    2. Crushed Roses 435-3
      ‎#dbb7bc
      ΔE = 3.279 / LRV ≈ 52.6%
  34. Australian Standard AS2700

    1. P31 Dusty Pink
      ‎#dbbebb
      ΔE = 3.017 / LRV ≈ 55.5%
    2. P21 Sunset Pink
      ‎#e2bbbd
      ΔE = 4.132 / LRV ≈ 55.4%
  35. Dunn-Edwards

    1. Pencil Eraser / 1805
      ‎#dbb7bb
      ΔE = 3.020 / LRV ≈ 52.5%
    2. Melting Violet / 1669
      ‎#d4b8bf
      ΔE = 3.253 / LRV ≈ 52.0%
  36. California Paints

    1. DE 6024 - Pencil Eraser
      ‎#dbb7bb
      ΔE = 3.020 / LRV ≈ 52.5%
    2. DE 6052 - Dusty Trail
      ‎#cdb1ab
      ΔE = 3.577 / LRV ≈ 47.4%
  37. Glidden

    1. Subdued / PPG1015-4
      ‎#ccb8b3
      ΔE = 3.029 / LRV ≈ 50.4%
    2. Jack Rabbit / PPG1014-4
      ‎#c0b2b1
      ΔE = 4.547 / LRV ≈ 46.2%
  38. Sherwin-Williams

    1. Fading Rose - 6296
      ‎#dabdc1
      ΔE = 3.077 / LRV ≈ 55.2%
    2. Delightful - 6289
      ‎#d2b6be
      ΔE = 3.647 / LRV ≈ 50.9%
  39. Dulux

    1. 90RR 55/138
      ‎#debab9
      ΔE = 3.079 / LRV ≈ 54.2%
    2. 70RR 57/070
      ‎#d4c1c2
      ΔE = 3.712 / LRV ≈ 56.0%
  40. Crown Paint

    1. Gentle
      ‎#c7b5b8
      ΔE = 3.194 / LRV ≈ 48.7%
    2. Hot Pants
      ‎#dcc3c4
      ΔE = 4.269 / LRV ≈ 58.2%
  41. Levis

    1. Rozenbloesem
      ‎#d6c0be
      ΔE = 3.229 / LRV ≈ 55.7%
    2. Subtle Berry
      ‎#dbc4c2
      ΔE = 4.545 / LRV ≈ 58.4%
  42. Diamond Vogel

    1. Pink Softness / 0077
      ‎#ddbabe
      ΔE = 3.271 / LRV ≈ 54.2%
    2. O Fortuna / 0070
      ‎#dfbbb8
      ΔE = 3.534 / LRV ≈ 54.7%
  43. Colortrend

    1. 0077
      ‎#ddbabe
      ΔE = 3.271 / LRV ≈ 54.2%
    2. Dawn Sky
      ‎#c2b3b3
      ΔE = 4.021 / LRV ≈ 47.0%
  44. Valspar Paint

    1. Summer Night
      ‎#d5b7b0
      ΔE = 3.286 / LRV ≈ 51.1%
    2. Candy
      ‎#d8bac5
      ΔE = 5.211 / LRV ≈ 53.7%
  45. Taubmans

    1. Raspberry Rose / T08 54-2
      ‎#dfbbbc
      ΔE = 3.297 / LRV ≈ 54.9%
    2. Star Twinkle / T12 35.C11
      ‎#d4c2c7
      ΔE = 4.865 / LRV ≈ 56.7%
  46. Earthpaint

    1. 4-48-2 Rose Shadow
      ‎#d6c0c2
      ΔE = 3.350 / LRV ≈ 55.9%
    2. 3-50-3 Colonial Pink
      ‎#dfb7b7
      ΔE = 3.676 / LRV ≈ 53.0%
  47. Fender

    1. 56 / Shell Pink
      ‎#dcbab5
      ΔE = 3.356 / LRV ≈ 53.7%
  48. Sanderson

    1. Kingly Grey
      ‎#d0aead
      ΔE = 3.364 / LRV ≈ 46.7%
    2. Dusty Lilac
      ‎#cbc1bf
      ΔE = 5.091 / LRV ≈ 54.6%
  49. General Paint

    1. Justin / CL 2532W
      ‎#cabbb8
      ΔE = 3.524 / LRV ≈ 51.6%
    2. Genie / CL 2592W
      ‎#d6b9ae
      ΔE = 5.012 / LRV ≈ 52.1%
  50. Chrysler

    1. Chinese Rose
      ‎#c6b0b3
      ΔE = 3.528 / LRV ≈ 46.3%
  51. Scib Paints

    1. Andrea's Anticipat / 8714
      ‎#dcbbc1
      ΔE = 3.688 / LRV ≈ 54.6%
    2. Demetrio / 8689
      ‎#ccaba9
      ΔE = 4.375 / LRV ≈ 44.8%
  52. AMC

    1. Cotillion Mauve
      ‎#ceafaa
      ΔE = 3.730 / LRV ≈ 46.7%
    2. Montego Light Rose
      ‎#cebeb8
      ΔE = 4.406 / LRV ≈ 53.4%
  53. Opaltone / OMS

    1. 4063
      ‎#d6b9b1
      ΔE = 3.730 / LRV ≈ 52.2%
    2. 4110
      ‎#c3adb3
      ΔE = 5.084 / LRV ≈ 44.7%
  54. Pantone / PMS

    1. 5025
      ‎#e0bdba
      ΔE = 3.785 / LRV ≈ 55.8%
    2. 5235
      ‎#d9c4c7
      ΔE = 4.820 / LRV ≈ 58.4%
  55. Coronado Paint

    1. 8713 - Shrub Rose
      ‎#d0afb5
      ΔE = 3.788 / LRV ≈ 47.4%
    2. 8106 - Minute Mauve
      ‎#e2bbbd
      ΔE = 4.132 / LRV ≈ 55.4%
  56. New Look

    1. Two for Tea / F29-09
      ‎#ccbdc0
      ΔE = 3.798 / LRV ≈ 53.0%
    2. Spring Blooms / F29-04
      ‎#e1c2c6
      ΔE = 4.862 / LRV ≈ 58.7%
  57. Dupont

    1. CAS794
      ‎#e0c0bf
      ΔE = 3.920 / LRV ≈ 57.3%
    2. CAS786
      ‎#d3c4c3
      ΔE = 4.889 / LRV ≈ 57.3%
  58. Caparol

    1. 1823
      ‎#c8acac
      ΔE = 3.952 / LRV ≈ 44.8%
    2. 15S 4 / Oxidbraun 15S 4
      ‎#d8c4c4
      ΔE = 4.531 / LRV ≈ 58.1%
  59. Bristol

    1. Bashful / P083-W3
      ‎#e1bfc1
      ΔE = 4.071 / LRV ≈ 57.1%
    2. Damask / P081-W3
      ‎#d6aeb6
      ΔE = 5.146 / LRV ≈ 47.9%
  60. Teknos

    1. PR330
      ‎#c8bbb7
      ΔE = 4.242 / LRV ≈ 51.2%
  61. Kelly-Moore

    1. Andrea's Anticipation / KM4155-1
      ‎#debac1
      ΔE = 4.283 / LRV ≈ 54.5%
    2. Think About It / KM4139-1
      ‎#dfc3c6
      ΔE = 4.711 / LRV ≈ 58.8%
  62. Alcro

    1. Silke
      ‎#c9bbb6
      ΔE = 4.284 / LRV ≈ 51.3%
  63. Flügger

    1. Rokoko: Jernoxydrød + Zinkhvid (No.4)
      ‎#e3bcbb
      ΔE = 4.312 / LRV ≈ 55.9%
    2. Purple Pleasure (IN-762)
      ‎#c6b9bf
      ΔE = 4.968 / LRV ≈ 50.5%
  64. British Standard

    1. BS 4800 02 C 33 - Lupin pink / Candy floss
      ‎#e1c1c4
      ΔE = 4.504 / LRV ≈ 58.1%
    2. BS381 453 - Shell pink
      ‎#dfc5c4
      ΔE = 4.985 / LRV ≈ 59.6%
  65. Laura Ashley

    1. 309 Dark Burgundy 3
      ‎#ccb2bb
      ΔE = 4.506 / LRV ≈ 48.3%
    2. 45-22 Chartwell Stone
      ‎#beb4b3
      ΔE = 5.174 / LRV ≈ 46.8%
  66. Toyo Ink

    1. CF10537
      ‎#d0bbb2
      ΔE = 4.558 / LRV ≈ 52.2%
    2. CF10743
      ‎#ceaba6
      ΔE = 5.006 / LRV ≈ 45.0%
  67. GM / General Motors

    1. Light Quartz Firemist
      ‎#c3b2ad
      ΔE = 4.565 / LRV ≈ 46.5%
    2. Light Antelope
      ‎#c1b7b9
      ΔE = 4.848 / LRV ≈ 48.7%
  68. Beckers

    1. Akleja 692 / S 2005-R
      ‎#cfc2c2
      ΔE = 4.656 / LRV ≈ 55.7%
    2. Ljuv 714 / 2305-Y91R
      ‎#cfc2c0
      ΔE = 4.731 / LRV ≈ 55.7%
  69. TRUMATCH

    1. 5-g5
      ‎#c2b7b4
      ΔE = 4.735 / LRV ≈ 48.6%
    2. 1-g5
      ‎#c2b9bc
      ΔE = 5.146 / LRV ≈ 49.8%
  70. Jotun

    1. 2845 / Bevegelse
      ‎#d4beb5
      ΔE = 4.772 / LRV ≈ 54.2%
  71. Homebase

    1. Pebble Beach
      ‎#ccbdb6
      ΔE = 4.827 / LRV ≈ 52.6%
  72. Tollens

    1. T2191-6
      ‎#c9bdb8
      ΔE = 4.828 / LRV ≈ 52.3%
    2. Boudoir d'antan | EE183
      ‎#c3bbbd
      ΔE = 5.168 / LRV ≈ 50.8%
  73. Focoltone

    1. 4051
      ‎#c8bbb5
      ΔE = 4.831 / LRV ≈ 51.2%
  74. Johnstone's Paint

    1. Pink Starburst
      ‎#e1b5b9
      ΔE = 4.848 / LRV ≈ 52.6%
    2. Iced Petal
      ‎#cdc2c0
      ΔE = 5.071 / LRV ≈ 55.4%
  75. Olympic

    1. Wild Rice D26-2
      ‎#d3bcb2
      ΔE = 4.882 / LRV ≈ 53.0%
    2. High Society D41-3
      ‎#c7b6be
      ΔE = 4.977 / LRV ≈ 49.3%
  76. Earthborn

    1. Eiderdown
      ‎#c7bebf
      ΔE = 4.901 / LRV ≈ 52.7%
  77. Opulence

    1. Venetian Glamour
      ‎#c0b5b8
      ΔE = 5.000 / LRV ≈ 47.7%
  78. Clark+Kensington

    1. Soul Mate / 44B-2
      ‎#d2c1c7
      ΔE = 5.035 / LRV ≈ 56.0%
    2. Afternoon Drizzle / N-C28
      ‎#ccc0c4
      ΔE = 5.045 / LRV ≈ 54.5%

הדמיית עיוורון צבעים

מונוכרומטיות

דיכרומיות

טריכומיות

‎#d2b7b7 HTML / CSS דוגמאות קוד

‎#d2b7b7 חזית

השמים הם הגבול

<p style="color: #d2b7b7">…</p>

‎#d2b7b7 רקע

ואהבת לרעך כמוך זה כלל גדול בתורה

<p style="background-color: #d2b7b7">…</p>

‎#d2b7b7 צל

יד רוחצת יד

<p style="text-shadow: 0.1em 0.1em 0.15em #d2b7b7">…</p>

תרשימי צבע

שטח המרות צבע

עשרוני
13809591
בינארי
11010010, 10110111, 10110111
הקסדצימלי
#d2b7b7
LRV
≈ 51.0%
ההקס הקצר הקרוב ביותר
#dbb ΔE = 2.680
RGB
rgb(210, 183, 183)
RGBA
rgba(210, 183, 183, 1.0)
כרומטוגרפיית RG
r: 0.365, g: 0.318, b: 0.318
RYB
אדום: 82.353%, צהוב: 71.765%, כחול: 71.765%
Android / android.graphics.Color
-2967625 / 0xffd2b7b7
HSL
hsl(0, 23%, 77%)
HSLA
hsla(0, 23%, 77%, 1.0)
HSV / HSB
גוון: 0° (0.000), רוויה: 13% (0.129), ערך: 82% (0.824)
HSP
גוון: 360.000, רוויה: 12.857%, בהירות נתפסת: 75.087%
HSLuv (HUSL)
H: 12.174, S: 26.923, L: 76.672
Cubehelix
H: -8.190, S: 0.231, L: 0.749
TSL
T: 3.946, S: 0.047, L: 0.749
CMYK
ציאן: 0% (0.000), מג'נטה: 13% (0.129), צהוב: 13% (0.129), מפתח: 18% (0.176)
CMY
ציאן: 18% (0.176), מג'נטה: 28% (0.282), צהוב: 28% (0.282)
XYZ
X: 52.059, Y: 50.989, Z: 51.890
xyY
x: 0.336, y: 0.329, Y: 50.989
CIELab
L: 76.672, a: 9.643, b: 3.559
CIELuv
L: 76.672, u: 16.217, v: 3.498
CIELCH / LCHab
L: 76.672, C: 10.279, H: 20.258
CIELUV / LCHuv
L: 76.672, C: 16.590, H: 12.174
Hunter-Lab
L: 71.406, a: 5.174, b: 6.899
CIECAM02
J: 69.921, C: 10.478, h: 18.164, Q: 164.746, M: 9.163, s: 23.584, H: 397.936
OSA-UCS
בהירות: -10.078, צהוב: 0.306, ירוק: -1.381
LMS
L: 51.626, M: 50.242, S: 51.878
YCbCr
Y: 180.136, Cb: 124.004, Cr: 139.853
YCoCg
Y: 189.750, Cg: -6.750, Co: 59.250
YDbDr
Y: 191.073, Db: -12.150, Dr: -35.991
YPbPr
Y: 188.751, Pb: -3.105, Pr: 13.500
xvYCC
Y: 178.104, Cb: 125.272, Cr: 139.859
YIQ
Y: 191.073, I: 16.084, Q: 5.709
YUV
Y: 191.073, U: -3.971, V: 16.605
מערכת הצבעים של מונסל
10RP 8/4 ΔE = 4.309
צבע המותג
Heroku (light) ΔE = 15.624

צבעים אקראיים

אדום

ירוק

כחול