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Recognised as Colour

#666BCC

  • #666BCC
  • Blue
  • Dark
  • Nearest: Medium purple

#666BCC is a blue with RGB values 102, 107, 204 and HSL 237°, 50%, 60%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Medium purple.

Colour values

#666BCC#666BCC
HEX#666BCC
RGBrgb(102, 107, 204)
RGB (0–1)0.4, 0.4196, 0.8
RGB percentages40%, 42%, 80%
HSLhsl(237.1, 50%, 60%)
HSV / HSBhsv(237.1, 50%, 80%)
CMYK50%, 47.5%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,712,268
CSS custom property--colour: #666BCC;

Brightness & contrast

Relative luminance0.177WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.63:1
Contrast with white4.63:1WCAG normal text: AA
Contrast with black4.54:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#999433

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4079D0no red cones; affects about 1% of men; ΔE 14.7 from the original
Deuteranopia#3771CAno green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#3E8092no blue cones; rare, and affects men and women equally; ΔE 53.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.63:1WCAG large text: AAA
Contrast with black, large text4.54:1WCAG large text: AAA

Named colours

Medium purple · ΔE 13.6Slate blue · ΔE 13.8Royal blue · ΔE 14.3Cornflower blue · ΔE 20Dark slateblue · ΔE 20.5Dodgerblue · ΔE 21.6
Nearest named CSS colourMedium purple (#9370DB)ΔE 13.61, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CCC766
Analogous#669ECC, #9466CC
Triadic#CC666B, #6BCC66
Split complementary#CC9466, #9ECC66
Tetradic#CC669E, #CCC766, #66CC94

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9DAF2
Lighter +20%#B3B5E6
Lighter +10%#8C90D9
Darker −10%#4046BF
Darker −20%#333899
Darker −30%#262A73
Darker −40%#1A1C4D
More saturated +25%#4D54E6
Less saturated −25%#8082B3

Channel breakdown

R102
G107
B204
Red102 (40%)
Green107 (42%)
Blue204 (80%)
Hue237.06°
Saturation (HSL)50%
Lightness60%
Dominant channelBlue
Hex per channelR 66 · G 6B · B CC

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Every value on this page was computed from “666bcc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.