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Colour

#21B476

  • #21B476
  • Cyan
  • Dark
  • Nearest: Medium seagreen

#21B476 is a cyan with RGB values 33, 180, 118 and HSL 155°, 69%, 42%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Medium seagreen.

Colour values

#21B476#21B476
HEX#21B476
RGBrgb(33, 180, 118)
RGB (0–1)0.1294, 0.7059, 0.4627
RGB percentages12.9%, 70.6%, 46.3%
HSLhsl(154.7, 69%, 41.8%)
HSV / HSBhsv(154.7, 81.7%, 70.6%)
CMYK81.7%, 0%, 34.4%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,208,886
CSS custom property--colour: #21B476;

Brightness & contrast

Relative luminance0.34274WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.85:1
Contrast with white2.67:1WCAG normal text: Fail
Contrast with black7.85:1WCAG normal text: AAA
Greyscale equivalent#909090
Inverted#DE4B89

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B2A572no red cones; affects about 1% of men; ΔE 49 from the original
Deuteranopia#A1997Ano green cones; the most common form, about 1% of men; ΔE 49.4 from the original
Tritanopia#00B3A4no blue cones; rare, and affects men and women equally; ΔE 26.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.67:1WCAG large text: Fail
Contrast with black, large text7.85:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 4.3Sea green · ΔE 18Medium aquamarine · ΔE 21.3Light green · ΔE 26.9Forest green · ΔE 27.8Dark seagreen · ΔE 28.7
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 4.33, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B4215F
Analogous#21B42D, #21A8B4
Triadic#7621B4, #B47621
Split complementary#B421A8, #B42D21
Tetradic#2D21B4, #B4215F, #A8B421

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B0F1D6
Lighter +30%#85E9BF
Lighter +20%#5AE1A8
Lighter +10%#2FD991
Darker −10%#19895A
Darker −20%#115E3D
Darker −30%#093321
Darker −40%#010805
More saturated +25%#06CF7A
Less saturated −25%#3C9972

Channel breakdown

R33
G180
B118
Red33 (12.9%)
Green180 (70.6%)
Blue118 (46.3%)
Hue154.69°
Saturation (HSL)69.01%
Lightness41.76%
Dominant channelGreen
Hex per channelR 21 · G B4 · B 76

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Every value on this page was computed from “21b476” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.