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Recognised as Colour

#21B49A

  • #21B49A
  • Cyan
  • Dark
  • Nearest: Light seagreen

#21B49A is a cyan with RGB values 33, 180, 154 and HSL 169°, 69%, 42%. It is a dark colour, so black text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#21B49A#21B49A
HEX#21B49A
RGBrgb(33, 180, 154)
RGB (0–1)0.1294, 0.7059, 0.6039
RGB percentages12.9%, 70.6%, 60.4%
HSLhsl(169.4, 69%, 41.8%)
HSV / HSBhsv(169.4, 81.7%, 70.6%)
CMYK81.7%, 0%, 14.4%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,208,922
CSS custom property--colour: #21B49A;

Brightness & contrast

Relative luminance0.35299WCAG 2.x, 0 is black and 1 is white
Perceived brightness148.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.06:1
Contrast with white2.61:1WCAG normal text: Fail
Contrast with black8.06:1WCAG normal text: AAA
Greyscale equivalent#939393
Inverted#DE4B65

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#ADA899no red cones; affects about 1% of men; ΔE 42.4 from the original
Deuteranopia#9A9B9Cno green cones; the most common form, about 1% of men; ΔE 42.8 from the original
Tritanopia#00B7ACno blue cones; rare, and affects men and women equally; ΔE 8.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.61:1WCAG large text: Fail
Contrast with black, large text8.06:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 10.6Medium aquamarine · ΔE 12Medium turquoise · ΔE 16.5Turquoise · ΔE 16.8Dark turquoise · ΔE 19Dark cyan · ΔE 21.8
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 10.56, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B4213B
Analogous#21B451, #2184B4
Triadic#9A21B4, #B49A21
Split complementary#B42184, #B45121
Tetradic#5121B4, #B4213B, #84B421

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B0F1E5
Lighter +30%#85E9D7
Lighter +20%#5AE1C9
Lighter +10%#2FD9BB
Darker −10%#198975
Darker −20%#115E50
Darker −30%#09332B
Darker −40%#010807
More saturated +25%#06CFAB
Less saturated −25%#3C9989

Channel breakdown

R33
G180
B154
Red33 (12.9%)
Green180 (70.6%)
Blue154 (60.4%)
Hue169.39°
Saturation (HSL)69.01%
Lightness41.76%
Dominant channelGreen
Hex per channelR 21 · G B4 · B 9A

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Every value on this page was computed from “21b49a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.