Colour

#6666CC

#6666CC
Blue
Dark
Nearest: Slate blue

#6666CC is a blue with RGB values 102, 102, 204 and HSL 240°, 50%, 60%. It is a dark colour, so white text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#6666CC#6666CC

HEX#6666CC

HEX (short)#66C

RGBrgb(102, 102, 204)

RGB (0–1)0.4, 0.4, 0.8

RGB percentages40%, 40%, 80%

HSLhsl(240, 50%, 60%)

HSV / HSBhsv(240, 50%, 80%)

CMYK50%, 50%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,710,988

CSS custom property--colour: #6666CC;

Brightness & contrast

Relative luminance0.16687WCAG 2.x, 0 is black and 1 is white

Perceived brightness118.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.84:1

Contrast with white4.84:1WCAG normal text: AA

Contrast with black4.34:1WCAG normal text: Fail

Greyscale equivalent#6D6D6D

Inverted#999933

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#3676D0no red cones; affects about 1% of men; ΔE 17.3 from the original

Deuteranopia#2C6ECAno green cones; the most common form, about 1% of men; ΔE 15.6 from the original

Tritanopia#3E7C8Fno blue cones; rare, and affects men and women equally; ΔE 55.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text4.84:1WCAG large text: AAA

Contrast with black, large text4.34:1WCAG large text: AA

Named colours

Slate blue · ΔE 9.9 Medium purple · ΔE 12 Royal blue · ΔE 12.2 Medium slateblue · ΔE 18.7 Dark slateblue · ΔE 20.4 Rebecca purple · ΔE 22.2

Nearest named CSS colourSlate blue (#6A5ACD)ΔE 9.94, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#CCCC66

Analogous#6699CC, #9966CC

Triadic#CC6666, #66CC66

Split complementary#CC9966, #99CC66

Tetradic#CC6699, #CCCC66, #66CC99

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FFFFFF

Lighter +30%#D9D9F2

Lighter +20%#B3B3E6

Lighter +10%#8C8CD9

Darker −10%#4040BF

Darker −20%#333399

Darker −30%#262673

Darker −40%#1A1A4D

More saturated +25%#4D4DE6

Less saturated −25%#8080B3

Channel breakdown

R102

G102

B204

Red102 (40%)

Green102 (40%)

Blue204 (80%)

Hue240°

Saturation (HSL)50%

Lightness60%

Dominant channelBlue

Hex per channelR 66 · G 66 · B CC

Keep nerding

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#6666CC

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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