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Recognised as Colour

#669DED

  • #669DED
  • Blue
  • Dark
  • Nearest: Cornflower blue

#669DED is a blue with RGB values 102, 157, 237 and HSL 216°, 79%, 66%. It is a dark colour, so black text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#669DED#669DED
HEX#669DED
RGBrgb(102, 157, 237)
RGB (0–1)0.4, 0.6157, 0.9294
RGB percentages40%, 61.6%, 92.9%
HSLhsl(215.6, 78.9%, 66.5%)
HSV / HSBhsv(215.6, 57%, 92.9%)
CMYK57%, 33.8%, 0%, 7.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,725,101
CSS custom property--colour: #669DED;

Brightness & contrast

Relative luminance0.33053WCAG 2.x, 0 is black and 1 is white
Perceived brightness154.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.61:1
Contrast with white2.76:1WCAG normal text: Fail
Contrast with black7.61:1WCAG normal text: AAA
Greyscale equivalent#979797
Inverted#996212

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7CA3F0no red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#6B96EBno green cones; the most common form, about 1% of men; ΔE 5.1 from the original
Tritanopia#00AFBAno blue cones; rare, and affects men and women equally; ΔE 48 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.76:1WCAG large text: Fail
Contrast with black, large text7.61:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 6Dodgerblue · ΔE 19Steel blue · ΔE 20.1Deep skyblue · ΔE 24.4Light skyblue · ΔE 28.1Royal blue · ΔE 33.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 6.02, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EDB666
Analogous#66E1ED, #7366ED
Triadic#ED669D, #9DED66
Split complementary#ED7266, #E1ED66
Tetradic#ED66E1, #EDB666, #66ED73

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EFF5FD
Lighter +20%#C1D7F8
Lighter +10%#94BAF2
Darker −10%#3880E8
Darker −20%#1965D4
Darker −30%#144FA6
Darker −40%#0E3A79
More saturated +25%#549AFF
Less saturated −25%#7BA1D8

Channel breakdown

R102
G157
B237
Red102 (40%)
Green157 (61.6%)
Blue237 (92.9%)
Hue215.56°
Saturation (HSL)78.95%
Lightness66.47%
Dominant channelBlue
Hex per channelR 66 · G 9D · B ED

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Every value on this page was computed from “669ded” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.