Colour

#21A4DC

#21A4DC
Cyan
Dark
Nearest: Deep skyblue

#21A4DC is a cyan with RGB values 33, 164, 220 and HSL 198°, 74%, 50%. It is a dark colour, so black text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21A4DC#21A4DC

HEX#21A4DC

RGBrgb(33, 164, 220)

RGB (0–1)0.1294, 0.6431, 0.8627

RGB percentages12.9%, 64.3%, 86.3%

HSLhsl(198, 73.9%, 49.6%)

HSV / HSBhsv(198, 85%, 86.3%)

CMYK85%, 25.5%, 0%, 13.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,204,892

CSS custom property--colour: #21A4DC;

Brightness & contrast

Relative luminance0.32042WCAG 2.x, 0 is black and 1 is white

Perceived brightness147.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.41:1

Contrast with white2.83:1WCAG normal text: Fail

Contrast with black7.41:1WCAG normal text: AAA

Greyscale equivalent#8C8C8C

Inverted#DE5B23

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#88A3DFno red cones; affects about 1% of men; ΔE 20.5 from the original

Deuteranopia#7092DBno green cones; the most common form, about 1% of men; ΔE 22.6 from the original

Tritanopia#00B3B7no blue cones; rare, and affects men and women equally; ΔE 33 from the original

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

Contrast with white, large text2.83:1WCAG large text: Fail

Contrast with black, large text7.41:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 10.9 Steel blue · ΔE 15.9 Light skyblue · ΔE 19.1 Sky blue · ΔE 22.9 Cornflower blue · ΔE 26.2 Light steelblue · ΔE 30

Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 10.9, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#DC5921

Analogous#21DCB7, #2146DC

Triadic#DC21A4, #A4DC21

Split complementary#DC2146, #DCB721

Tetradic#B721DC, #DC5921, #46DC21

Tints, shades & saturation

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

Lighter +40%#D1ECF8

Lighter +30%#A5DAF1

Lighter +20%#78C8EB

Lighter +10%#4CB7E4

Darker −10%#1A83B0

Darker −20%#146283

Darker −30%#0D4157

Darker −40%#06202B

More saturated +25%#01B1FC

Less saturated −25%#4197BC

Channel breakdown

R33

G164

B220

Red33 (12.9%)

Green164 (64.3%)

Blue220 (86.3%)

Hue197.97°

Saturation (HSL)73.91%

Lightness49.61%

Dominant channelBlue

Hex per channelR 21 · G A4 · B DC

Keep nerding

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#21A4DC

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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