Colour

#21CFE4

#21CFE4
Cyan
Light
Nearest: Dark turquoise

#21CFE4 is a cyan with RGB values 33, 207, 228 and HSL 186°, 78%, 51%. It is a light colour, so black text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark turquoise.

Colour values

#21CFE4#21CFE4

HEX#21CFE4

RGBrgb(33, 207, 228)

RGB (0–1)0.1294, 0.8118, 0.8941

RGB percentages12.9%, 81.2%, 89.4%

HSLhsl(186.5, 78.3%, 51.2%)

HSV / HSBhsv(186.5, 85.5%, 89.4%)

CMYK85.5%, 9.2%, 0%, 10.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,215,908

CSS custom property--colour: #21CFE4;

Brightness & contrast

Relative luminance0.5055WCAG 2.x, 0 is black and 1 is white

Perceived brightness177.2 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 11.11:1

Contrast with white1.89:1WCAG normal text: Fail

Contrast with black11.11:1WCAG normal text: AAA

Greyscale equivalent#ACACAC

Inverted#DE301B

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#BCC7E5no red cones; affects about 1% of men; ΔE 36.5 from the original

Deuteranopia#A3B5E4no green cones; the most common form, about 1% of men; ΔE 38 from the original

Tritanopia#00D9D5no blue cones; rare, and affects men and women equally; ΔE 15.6 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text1.89:1WCAG large text: Fail

Contrast with black, large text11.11:1WCAG large text: AAA

Named colours

Dark turquoise · ΔE 10.9 Medium turquoise · ΔE 14.3 Sky blue · ΔE 18.8 Light seagreen · ΔE 19.4 Turquoise · ΔE 21.5 Aqua · ΔE 22.2

Nearest named CSS colourDark turquoise (#00CED1)ΔE 10.87, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#E43621

Analogous#21E498, #216EE4

Triadic#E421CF, #CFE421

Split complementary#E4216E, #E49721

Tetradic#9721E4, #E43621, #6EE421

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#D7F6FA

Lighter +30%#A9ECF5

Lighter +20%#7CE3EF

Lighter +10%#4ED9EA

Darker −10%#17AABB

Darker −20%#11808E

Darker −30%#0C5760

Darker −40%#062E33

More saturated +25%#06E4FF

Less saturated −25%#40B7C5

Channel breakdown

R33

G207

B228

Red33 (12.9%)

Green207 (81.2%)

Blue228 (89.4%)

Hue186.46°

Saturation (HSL)78.31%

Lightness51.18%

Dominant channelBlue

Hex per channelR 21 · G CF · B E4

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#21CFE4

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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