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Recognised as Colour

#21AFE4

  • #21AFE4
  • Cyan
  • Dark
  • Nearest: Deep skyblue

#21AFE4 is a cyan with RGB values 33, 175, 228 and HSL 196°, 78%, 51%. It is a dark colour, so black text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21AFE4#21AFE4
HEX#21AFE4
RGBrgb(33, 175, 228)
RGB (0–1)0.1294, 0.6863, 0.8941
RGB percentages12.9%, 68.6%, 89.4%
HSLhsl(196.3, 78.3%, 51.2%)
HSV / HSBhsv(196.3, 85.5%, 89.4%)
CMYK85.5%, 23.2%, 0%, 10.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,207,716
CSS custom property--colour: #21AFE4;

Brightness & contrast

Relative luminance0.36585WCAG 2.x, 0 is black and 1 is white
Perceived brightness155.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.32:1
Contrast with white2.52:1WCAG normal text: Fail
Contrast with black8.32:1WCAG normal text: AAA
Greyscale equivalent#959595
Inverted#DE501B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#94ADE7no red cones; affects about 1% of men; ΔE 23.4 from the original
Deuteranopia#7B9BE3no green cones; the most common form, about 1% of men; ΔE 25.5 from the original
Tritanopia#00BEC1no blue cones; rare, and affects men and women equally; ΔE 31.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.52:1WCAG large text: Fail
Contrast with black, large text8.32:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 8.2Light skyblue · ΔE 16.4Sky blue · ΔE 19.8Steel blue · ΔE 20.1Light steelblue · ΔE 29.1Cadetblue · ΔE 29.8
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 8.18, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E45621
Analogous#21E4B7, #214EE4
Triadic#E421AF, #AFE421
Split complementary#E4214E, #E4B721
Tetradic#B721E4, #E45621, #4EE421

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D7F1FA
Lighter +30%#A9E0F5
Lighter +20%#7CD0EF
Lighter +10%#4EBFEA
Darker −10%#178FBB
Darker −20%#116C8E
Darker −30%#0C4960
Darker −40%#062733
More saturated +25%#06BBFF
Less saturated −25%#40A1C5

Channel breakdown

R33
G175
B228
Red33 (12.9%)
Green175 (68.6%)
Blue228 (89.4%)
Hue196.31°
Saturation (HSL)78.31%
Lightness51.18%
Dominant channelBlue
Hex per channelR 21 · G AF · B E4

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Every value on this page was computed from “21afe4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.