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Recognised as Colour

#66AFCB

  • #66AFCB
  • Cyan
  • Dark
  • Nearest: Sky blue

#66AFCB is a cyan with RGB values 102, 175, 203 and HSL 197°, 49%, 60%. It is a dark colour, so black text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#66AFCB#66AFCB
HEX#66AFCB
RGBrgb(102, 175, 203)
RGB (0–1)0.4, 0.6863, 0.7961
RGB percentages40%, 68.6%, 79.6%
HSLhsl(196.6, 49.3%, 59.8%)
HSV / HSBhsv(196.6, 49.8%, 79.6%)
CMYK49.8%, 13.8%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,729,675
CSS custom property--colour: #66AFCB;

Brightness & contrast

Relative luminance0.37797WCAG 2.x, 0 is black and 1 is white
Perceived brightness160.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.56:1
Contrast with white2.45:1WCAG normal text: Fail
Contrast with black8.56:1WCAG normal text: AAA
Greyscale equivalent#A2A2A2
Inverted#995034

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A0ACCCno red cones; affects about 1% of men; ΔE 18.4 from the original
Deuteranopia#91A0CBno green cones; the most common form, about 1% of men; ΔE 19.9 from the original
Tritanopia#2EB8B8no blue cones; rare, and affects men and women equally; ΔE 22.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.45:1WCAG large text: Fail
Contrast with black, large text8.56:1WCAG large text: AAA

Named colours

Sky blue · ΔE 11.3Light skyblue · ΔE 14.5Cadetblue · ΔE 16Light steelblue · ΔE 18.5Light blue · ΔE 19.2Light slate grey · ΔE 20.3
Nearest named CSS colourSky blue (#87CEEB)ΔE 11.34, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB8266
Analogous#66CBB4, #667DCB
Triadic#CB66AF, #AFCB66
Split complementary#CB667D, #CBB466
Tetradic#B466CB, #CB8266, #7DCB66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FEFFFF
Lighter +30%#D8EBF2
Lighter +20%#B2D7E5
Lighter +10%#8CC3D8
Darker −10%#409BBE
Darker −20%#337C98
Darker −30%#275D71
Darker −40%#1A3E4B
More saturated +25%#4CBAE5
Less saturated −25%#80A4B1

Channel breakdown

R102
G175
B203
Red102 (40%)
Green175 (68.6%)
Blue203 (79.6%)
Hue196.63°
Saturation (HSL)49.27%
Lightness59.8%
Dominant channelBlue
Hex per channelR 66 · G AF · B CB

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