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Colour

#6668CD

  • #6668CD
  • Blue
  • Dark
  • Nearest: Slate blue

#6668CD is a blue with RGB values 102, 104, 205 and HSL 239°, 51%, 60%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#6668CD#6668CD
HEX#6668CD
RGBrgb(102, 104, 205)
RGB (0–1)0.4, 0.4078, 0.8039
RGB percentages40%, 40.8%, 80.4%
HSLhsl(238.8, 50.7%, 60.2%)
HSV / HSBhsv(238.8, 50.2%, 80.4%)
CMYK50.2%, 49.3%, 0%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,711,501
CSS custom property--colour: #6668CD;

Brightness & contrast

Relative luminance0.17133WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.74:1
Contrast with white4.74:1WCAG normal text: AA
Contrast with black4.43:1WCAG normal text: Fail
Greyscale equivalent#6F6F6F
Inverted#999732

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3977D1no red cones; affects about 1% of men; ΔE 16.2 from the original
Deuteranopia#2F6FCBno green cones; the most common form, about 1% of men; ΔE 14.6 from the original
Tritanopia#3D7E91no blue cones; rare, and affects men and women equally; ΔE 55.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.74:1WCAG large text: AAA
Contrast with black, large text4.43:1WCAG large text: AA

Named colours

Slate blue · ΔE 11Medium purple · ΔE 12.3Royal blue · ΔE 12.5Medium slateblue · ΔE 19.5Dark slateblue · ΔE 20.6Cornflower blue · ΔE 22.3
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 11.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CDCB66
Analogous#669BCD, #9866CD
Triadic#CD6668, #68CD66
Split complementary#CD9866, #9BCD66
Tetradic#CD669C, #CDCB66, #66CD98

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9DAF3
Lighter +20%#B3B4E6
Lighter +10%#8C8EDA
Darker −10%#4042C0
Darker −20%#32359B
Darker −30%#262774
Darker −40%#191A4E
More saturated +25%#4D50E6
Less saturated −25%#7F80B4

Channel breakdown

R102
G104
B205
Red102 (40%)
Green104 (40.8%)
Blue205 (80.4%)
Hue238.83°
Saturation (HSL)50.74%
Lightness60.2%
Dominant channelBlue
Hex per channelR 66 · G 68 · B CD

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Every value on this page was computed from “6668cd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.