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Recognised as Colour

#40D8FE

  • #40D8FE
  • Cyan
  • Light
  • Nearest: Sky blue

#40D8FE is a cyan with RGB values 64, 216, 254 and HSL 192°, 99%, 62%. It is a light colour, so black text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#40D8FE#40D8FE
HEX#40D8FE
RGBrgb(64, 216, 254)
RGB (0–1)0.251, 0.8471, 0.9961
RGB percentages25.1%, 84.7%, 99.6%
HSLhsl(192, 99%, 62.4%)
HSV / HSBhsv(192, 74.8%, 99.6%)
CMYK74.8%, 15%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,249,854
CSS custom property--colour: #40D8FE;

Brightness & contrast

Relative luminance0.57357WCAG 2.x, 0 is black and 1 is white
Perceived brightness189.6 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.47:1
Contrast with white1.68:1WCAG normal text: Fail
Contrast with black12.47:1WCAG normal text: AAA
Greyscale equivalent#BABABA
Inverted#BF2701

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C0D2FFno red cones; affects about 1% of men; ΔE 31.3 from the original
Deuteranopia#A7BFFEno green cones; the most common form, about 1% of men; ΔE 33.8 from the original
Tritanopia#00E5E4no blue cones; rare, and affects men and women equally; ΔE 24.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.68:1WCAG large text: Fail
Contrast with black, large text12.47:1WCAG large text: AAA

Named colours

Sky blue · ΔE 14.9Light skyblue · ΔE 16.3Deep skyblue · ΔE 17.6Dark turquoise · ΔE 21.5Medium turquoise · ΔE 24.1Light blue · ΔE 24.7
Nearest named CSS colourSky blue (#87CEEB)ΔE 14.93, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FE6640
Analogous#40FEC5, #4079FE
Triadic#FE40D8, #D8FE40
Split complementary#FE4079, #FEC540
Tetradic#C540FE, #FE6640, #79FE40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D8F7FF
Lighter +20%#A5EDFF
Lighter +10%#73E2FE
Darker −10%#0DCEFE
Darker −20%#01ACD7
Darker −30%#0183A4
Darker −40%#015B71
More saturated +25%#3FD9FF
Less saturated −25%#58CAE6

Channel breakdown

R64
G216
B254
Red64 (25.1%)
Green216 (84.7%)
Blue254 (99.6%)
Hue192°
Saturation (HSL)98.96%
Lightness62.35%
Dominant channelBlue
Hex per channelR 40 · G D8 · B FE

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Every value on this page was computed from “40d8fe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.