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Recognised as Colour

#669EFF

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

#669EFF is a blue with RGB values 102, 158, 255 and HSL 218°, 100%, 70%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#669EFF#669EFF
HEX#669EFF
RGBrgb(102, 158, 255)
RGB (0–1)0.4, 0.6196, 1
RGB percentages40%, 62%, 100%
HSLhsl(218, 100%, 70%)
HSV / HSBhsv(218, 60%, 100%)
CMYK60%, 38%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,725,375
CSS custom property--colour: #669EFF;

Brightness & contrast

Relative luminance0.34499WCAG 2.x, 0 is black and 1 is white
Perceived brightness158.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.9:1
Contrast with white2.66:1WCAG normal text: Fail
Contrast with black7.9:1WCAG normal text: AAA
Greyscale equivalent#999999
Inverted#996100

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#74A6FFno red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#5F98FDno green cones; the most common form, about 1% of men; ΔE 3.4 from the original
Tritanopia#00B4C2no blue cones; rare, and affects men and women equally; ΔE 55.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.66:1WCAG large text: Fail
Contrast with black, large text7.9:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 5.7Dodgerblue · ΔE 11.4Royal blue · ΔE 26.4Medium purple · ΔE 28.7Steel blue · ΔE 28.9Deep skyblue · ΔE 30.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 5.68, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFC766
Analogous#66EBFF, #7A66FF
Triadic#FF669E, #9EFF66
Split complementary#FF7A66, #EBFF66
Tetradic#FF66EB, #FFC766, #66FF7A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCDFFF
Lighter +10%#99BEFF
Darker −10%#337EFF
Darker −20%#005DFF
Darker −30%#004BCC
Darker −40%#003899
More saturated +25%#669EFF
Less saturated −25%#79A3EC

Channel breakdown

R102
G158
B255
Red102 (40%)
Green158 (62%)
Blue255 (100%)
Hue218.04°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G 9E · B FF

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