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Recognised as Colour

#21C8FB

  • #21C8FB
  • Cyan
  • Dark
  • Nearest: Deep skyblue

#21C8FB is a cyan with RGB values 33, 200, 251 and HSL 194°, 96%, 56%. It is a dark colour, so black text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21C8FB#21C8FB
HEX#21C8FB
RGBrgb(33, 200, 251)
RGB (0–1)0.1294, 0.7843, 0.9843
RGB percentages12.9%, 78.4%, 98.4%
HSLhsl(194, 96.5%, 55.7%)
HSV / HSBhsv(194, 86.9%, 98.4%)
CMYK86.9%, 20.3%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,214,139
CSS custom property--colour: #21C8FB;

Brightness & contrast

Relative luminance0.48597WCAG 2.x, 0 is black and 1 is white
Perceived brightness176 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.72:1
Contrast with white1.96:1WCAG normal text: Fail
Contrast with black10.72:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#DE3704

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#ACC4FEno red cones; affects about 1% of men; ΔE 28.4 from the original
Deuteranopia#91B1FAno green cones; the most common form, about 1% of men; ΔE 30.2 from the original
Tritanopia#00D7D9no blue cones; rare, and affects men and women equally; ΔE 30 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.96:1WCAG large text: Fail
Contrast with black, large text10.72:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 8.4Light skyblue · ΔE 14.8Sky blue · ΔE 17.3Dark turquoise · ΔE 28.7Light blue · ΔE 28.7Steel blue · ΔE 29.6
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 8.39, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FB5421
Analogous#21FBC1, #215BFB
Triadic#FB21C8, #C8FB21
Split complementary#FB215B, #FBC121
Tetradic#C121FB, #FB5421, #5BFB21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9FAFF
Lighter +30%#B7EDFE
Lighter +20%#85E1FD
Lighter +10%#53D4FC
Darker −10%#04B0E5
Darker −20%#038AB3
Darker −30%#026381
Darker −40%#013D4F
More saturated +25%#1DCAFF
Less saturated −25%#3DB9DF

Channel breakdown

R33
G200
B251
Red33 (12.9%)
Green200 (78.4%)
Blue251 (98.4%)
Hue194.04°
Saturation (HSL)96.46%
Lightness55.69%
Dominant channelBlue
Hex per channelR 21 · G C8 · B FB

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Every value on this page was computed from “21c8fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.