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Recognised as Colour

#63C5E9

  • #63C5E9
  • Cyan
  • Dark
  • Nearest: Sky blue

#63C5E9 is a cyan with RGB values 99, 197, 233 and HSL 196°, 75%, 65%. It is a dark colour, so black text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#63C5E9#63C5E9
HEX#63C5E9
RGBrgb(99, 197, 233)
RGB (0–1)0.3882, 0.7725, 0.9137
RGB percentages38.8%, 77.3%, 91.4%
HSLhsl(196.1, 75.3%, 65.1%)
HSV / HSBhsv(196.1, 57.5%, 91.4%)
CMYK57.5%, 15.5%, 0%, 8.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,538,729
CSS custom property--colour: #63C5E9;

Brightness & contrast

Relative luminance0.48468WCAG 2.x, 0 is black and 1 is white
Perceived brightness178.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.69:1
Contrast with white1.96:1WCAG normal text: Fail
Contrast with black10.69:1WCAG normal text: AAA
Greyscale equivalent#B3B3B3
Inverted#9C3A16

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B1C1EBno red cones; affects about 1% of men; ΔE 22.8 from the original
Deuteranopia#9EB3E9no green cones; the most common form, about 1% of men; ΔE 24.1 from the original
Tritanopia#00D0D1no blue cones; rare, and affects men and women equally; ΔE 26.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.96:1WCAG large text: Fail
Contrast with black, large text10.69:1WCAG large text: AAA

Named colours

Sky blue · ΔE 7.7Light skyblue · ΔE 9.3Deep skyblue · ΔE 16.2Light blue · ΔE 19.1Light steelblue · ΔE 21Powder blue · ΔE 22.1
Nearest named CSS colourSky blue (#87CEEB)ΔE 7.69, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E98763
Analogous#63E9CA, #6382E9
Triadic#E963C5, #C5E963
Split complementary#E96382, #E9CA63
Tetradic#CA63E9, #E98763, #82E963

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E9F7FC
Lighter +20%#BCE6F6
Lighter +10%#90D6EF
Darker −10%#36B4E3
Darker −20%#1C9BCA
Darker −30%#16799D
Darker −40%#105670
More saturated +25%#4DCFFF
Less saturated −25%#79BBD3

Channel breakdown

R99
G197
B233
Red99 (38.8%)
Green197 (77.3%)
Blue233 (91.4%)
Hue196.12°
Saturation (HSL)75.28%
Lightness65.1%
Dominant channelBlue
Hex per channelR 63 · G C5 · B E9

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Every value on this page was computed from “63c5e9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.