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Recognised as Colour

#668BD6

  • #668BD6
  • Blue
  • Dark
  • Nearest: Cornflower blue

#668BD6 is a blue with RGB values 102, 139, 214 and HSL 220°, 58%, 62%. 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

#668BD6#668BD6
HEX#668BD6
RGBrgb(102, 139, 214)
RGB (0–1)0.4, 0.5451, 0.8392
RGB percentages40%, 54.5%, 83.9%
HSLhsl(220.2, 57.7%, 62%)
HSV / HSBhsv(220.2, 52.3%, 83.9%)
CMYK52.3%, 35%, 0%, 16.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,470
CSS custom property--colour: #668BD6;

Brightness & contrast

Relative luminance0.26145WCAG 2.x, 0 is black and 1 is white
Perceived brightness140.3 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#997429

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6D91D9no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#6087D4no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#2E9BA6no blue cones; rare, and affects men and women equally; ΔE 44.4 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 7.9Steel blue · ΔE 17.1Dodgerblue · ΔE 21.1Medium purple · ΔE 29.6Deep skyblue · ΔE 29.7Royal blue · ΔE 30.8
Nearest named CSS colourCornflower blue (#6495ED)ΔE 7.89, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D6B166
Analogous#66C3D6, #7966D6
Triadic#D6668B, #8BD666
Split complementary#D67966, #C3D666
Tetradic#D666C3, #D6B166, #66D679

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DFE6F6
Lighter +20%#B6C8EC
Lighter +10%#8EA9E1
Darker −10%#3E6DCB
Darker −20%#2D56A9
Darker −30%#224281
Darker −40%#182D58
More saturated +25%#4E83EE
Less saturated −25%#7E93BE

Channel breakdown

R102
G139
B214
Red102 (40%)
Green139 (54.5%)
Blue214 (83.9%)
Hue220.18°
Saturation (HSL)57.73%
Lightness61.96%
Dominant channelBlue
Hex per channelR 66 · G 8B · B D6

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Every value on this page was computed from “668bd6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.