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Recognised as Colour

#66AFFF

  • #66AFFF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#66AFFF is a blue with RGB values 102, 175, 255 and HSL 211°, 100%, 70%. It is a dark colour, so black text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#66AFFF#66AFFF
HEX#66AFFF
RGBrgb(102, 175, 255)
RGB (0–1)0.4, 0.6863, 1
RGB percentages40%, 68.6%, 100%
HSLhsl(211.4, 100%, 70%)
HSV / HSBhsv(211.4, 60%, 100%)
CMYK60%, 31.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,729,727
CSS custom property--colour: #66AFFF;

Brightness & contrast

Relative luminance0.40705WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.14:1
Contrast with white2.3:1WCAG normal text: Fail
Contrast with black9.14:1WCAG normal text: AAA
Greyscale equivalent#A5A5A5
Inverted#995000

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8DB3FFno red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#79A4FDno green cones; the most common form, about 1% of men; ΔE 9.9 from the original
Tritanopia#00C1CCno blue cones; rare, and affects men and women equally; ΔE 46.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.3:1WCAG large text: Fail
Contrast with black, large text9.14:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 12.3Deep skyblue · ΔE 18.8Dodgerblue · ΔE 22.1Steel blue · ΔE 23Light skyblue · ΔE 23.4Sky blue · ΔE 30.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 12.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFB666
Analogous#66FBFF, #6A66FF
Triadic#FF66AF, #AFFF66
Split complementary#FF6A66, #FBFF66
Tetradic#FF66FB, #FFB666, #66FF6A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCE4FF
Lighter +10%#99CAFF
Darker −10%#3394FF
Darker −20%#007AFF
Darker −30%#0061CC
Darker −40%#004999
More saturated +25%#66AFFF
Less saturated −25%#79B0EC

Channel breakdown

R102
G175
B255
Red102 (40%)
Green175 (68.6%)
Blue255 (100%)
Hue211.37°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G AF · B FF

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Every value on this page was computed from “66afff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.