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Recognised as Colour

#668BD5

  • #668BD5
  • Blue
  • Dark
  • Nearest: Cornflower blue

#668BD5 is a blue with RGB values 102, 139, 213 and HSL 220°, 57%, 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

#668BD5#668BD5
HEX#668BD5
RGBrgb(102, 139, 213)
RGB (0–1)0.4, 0.5451, 0.8353
RGB percentages40%, 54.5%, 83.5%
HSLhsl(220, 56.9%, 61.8%)
HSV / HSBhsv(220, 52.1%, 83.5%)
CMYK52.1%, 34.7%, 0%, 16.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,469
CSS custom property--colour: #668BD5;

Brightness & contrast

Relative luminance0.26094WCAG 2.x, 0 is black and 1 is white
Perceived brightness140.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.22:1
Contrast with white3.38:1WCAG normal text: Fail
Contrast with black6.22:1WCAG normal text: AA
Greyscale equivalent#888888
Inverted#99742A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6E91D8no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#6187D3no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#2F9BA6no blue cones; rare, and affects men and women equally; ΔE 43.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.38:1WCAG large text: AA
Contrast with black, large text6.22:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.4Steel blue · ΔE 16.5Dodgerblue · ΔE 21.6Deep skyblue · ΔE 29.5Medium purple · ΔE 30.1Royal blue · ΔE 31.3
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.38, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D5B066
Analogous#66C3D5, #7966D5
Triadic#D5668B, #8BD566
Split complementary#D57966, #C3D566
Tetradic#D566C3, #D5B066, #66D579

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DEE6F6
Lighter +20%#B6C8EB
Lighter +10%#8EA9E0
Darker −10%#3E6DCA
Darker −20%#2E56A7
Darker −30%#23427F
Darker −40%#182D57
More saturated +25%#4E83ED
Less saturated −25%#7E93BD

Channel breakdown

R102
G139
B213
Red102 (40%)
Green139 (54.5%)
Blue213 (83.5%)
Hue220°
Saturation (HSL)56.92%
Lightness61.76%
Dominant channelBlue
Hex per channelR 66 · G 8B · B D5

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Every value on this page was computed from “668bd5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.