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Colour

#66CBFF

  • #66CBFF
  • Blue
  • Light
  • Nearest: Light skyblue

#66CBFF is a blue with RGB values 102, 203, 255 and HSL 200°, 100%, 70%. It is a light colour, so black text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Light skyblue.

Colour values

#66CBFF#66CBFF
HEX#66CBFF
RGBrgb(102, 203, 255)
RGB (0–1)0.4, 0.7961, 1
RGB percentages40%, 79.6%, 100%
HSLhsl(200.4, 100%, 70%)
HSV / HSBhsv(200.4, 60%, 100%)
CMYK60%, 20.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,736,895
CSS custom property--colour: #66CBFF;

Brightness & contrast

Relative luminance0.52757WCAG 2.x, 0 is black and 1 is white
Perceived brightness186.3 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.55:1
Contrast with white1.82:1WCAG normal text: Fail
Contrast with black11.55:1WCAG normal text: AAA
Greyscale equivalent#B9B9B9
Inverted#993400

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B2C9FFno red cones; affects about 1% of men; ΔE 20 from the original
Deuteranopia#9DB9FEno green cones; the most common form, about 1% of men; ΔE 22 from the original
Tritanopia#00D9DCno blue cones; rare, and affects men and women equally; ΔE 33.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.82:1WCAG large text: Fail
Contrast with black, large text11.55:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 7.3Deep skyblue · ΔE 10.1Sky blue · ΔE 13.2Light steelblue · ΔE 23.4Light blue · ΔE 24Steel blue · ΔE 27.5
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 7.27, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9A66
Analogous#66FFE6, #667FFF
Triadic#FF66CB, #CBFF66
Split complementary#FF667F, #FFE666
Tetradic#E666FF, #FF9A66, #7FFF66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCEEFF
Lighter +10%#99DCFF
Darker −10%#33BAFF
Darker −20%#00A8FF
Darker −30%#0087CC
Darker −40%#006599
More saturated +25%#66CBFF
Less saturated −25%#79C5EC

Channel breakdown

R102
G203
B255
Red102 (40%)
Green203 (79.6%)
Blue255 (100%)
Hue200.39°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G CB · B FF

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