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Recognised as Colour

#668CD0

  • #668CD0
  • Blue
  • Dark
  • Nearest: Cornflower blue

#668CD0 is a blue with RGB values 102, 140, 208 and HSL 218°, 53%, 61%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#668CD0#668CD0
HEX#668CD0
RGBrgb(102, 140, 208)
RGB (0–1)0.4, 0.549, 0.8157
RGB percentages40%, 54.9%, 81.6%
HSLhsl(218.5, 53%, 60.8%)
HSV / HSBhsv(218.5, 51%, 81.6%)
CMYK51%, 32.7%, 0%, 18.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,720
CSS custom property--colour: #668CD0;

Brightness & contrast

Relative luminance0.26135WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.23:1
Contrast with white3.37:1WCAG normal text: Fail
Contrast with black6.23:1WCAG normal text: AA
Greyscale equivalent#898989
Inverted#99732F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7291D3no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#6587CFno green cones; the most common form, about 1% of men; ΔE 3.3 from the original
Tritanopia#349BA4no blue cones; rare, and affects men and women equally; ΔE 41 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.37:1WCAG large text: AA
Contrast with black, large text6.23:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.4Steel blue · ΔE 13.4Dodgerblue · ΔE 24.7Deep skyblue · ΔE 27.8Light slate grey · ΔE 29.2Light skyblue · ΔE 29.3
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D0AA66
Analogous#66C1D0, #7566D0
Triadic#D0668C, #8CD066
Split complementary#D07566, #C1D066
Tetradic#D066C1, #D0AA66, #66D075

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DBE4F4
Lighter +20%#B4C7E8
Lighter +10%#8DA9DC
Darker −10%#3F6FC4
Darker −20%#31589F
Darker −30%#254378
Darker −40%#192D51
More saturated +25%#4D85E9
Less saturated −25%#7F93B7

Channel breakdown

R102
G140
B208
Red102 (40%)
Green140 (54.9%)
Blue208 (81.6%)
Hue218.49°
Saturation (HSL)53%
Lightness60.78%
Dominant channelBlue
Hex per channelR 66 · G 8C · B D0

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Every value on this page was computed from “668cd0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.