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Recognised as Colour

#66C0E9

  • #66C0E9
  • Cyan
  • Dark
  • Nearest: Light skyblue

#66C0E9 is a cyan with RGB values 102, 192, 233 and HSL 199°, 75%, 66%. It is a dark colour, so black text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Light skyblue.

Colour values

#66C0E9#66C0E9
HEX#66C0E9
RGBrgb(102, 192, 233)
RGB (0–1)0.4, 0.7529, 0.9137
RGB percentages40%, 75.3%, 91.4%
HSLhsl(198.8, 74.9%, 65.7%)
HSV / HSBhsv(198.8, 56.2%, 91.4%)
CMYK56.2%, 17.6%, 0%, 8.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,734,057
CSS custom property--colour: #66C0E9;

Brightness & contrast

Relative luminance0.46407WCAG 2.x, 0 is black and 1 is white
Perceived brightness175.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.28:1
Contrast with white2.04:1WCAG normal text: Fail
Contrast with black10.28:1WCAG normal text: AAA
Greyscale equivalent#B0B0B0
Inverted#993F16

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#ABBDEBno red cones; affects about 1% of men; ΔE 20 from the original
Deuteranopia#99AFE8no green cones; the most common form, about 1% of men; ΔE 21.5 from the original
Tritanopia#00CBCDno blue cones; rare, and affects men and women equally; ΔE 29 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.04:1WCAG large text: Fail
Contrast with black, large text10.28:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 7.5Sky blue · ΔE 9.1Deep skyblue · ΔE 14.2Light steelblue · ΔE 20Light blue · ΔE 20.3Powder blue · ΔE 24
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 7.51, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E98F66
Analogous#66E9D0, #667FE9
Triadic#E966C0, #C0E966
Split complementary#E9667F, #E9D066
Tetradic#D166E9, #E98F66, #7FE966

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#ECF7FC
Lighter +20%#BFE5F6
Lighter +10%#93D2EF
Darker −10%#39AEE3
Darker −20%#1D95CC
Darker −30%#17749F
Darker −40%#105473
More saturated +25%#50C8FF
Less saturated −25%#7CB8D3

Channel breakdown

R102
G192
B233
Red102 (40%)
Green192 (75.3%)
Blue233 (91.4%)
Hue198.78°
Saturation (HSL)74.86%
Lightness65.69%
Dominant channelBlue
Hex per channelR 66 · G C0 · B E9

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Every value on this page was computed from “66c0e9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.