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Recognised as Colour

#21AF90

  • #21AF90
  • Cyan
  • Dark
  • Nearest: Medium aquamarine

#21AF90 is a cyan with RGB values 33, 175, 144 and HSL 167°, 68%, 41%. It is a dark colour, so black text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#21AF90#21AF90
HEX#21AF90
RGBrgb(33, 175, 144)
RGB (0–1)0.1294, 0.6863, 0.5647
RGB percentages12.9%, 68.6%, 56.5%
HSLhsl(166.9, 68.3%, 40.8%)
HSV / HSBhsv(166.9, 81.1%, 68.6%)
CMYK81.1%, 0%, 17.7%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,207,632
CSS custom property--colour: #21AF90;

Brightness & contrast

Relative luminance0.32997WCAG 2.x, 0 is black and 1 is white
Perceived brightness143.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.6:1
Contrast with white2.76:1WCAG normal text: Fail
Contrast with black7.6:1WCAG normal text: AAA
Greyscale equivalent#8F8F8F
Inverted#DE506F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A9A38Fno red cones; affects about 1% of men; ΔE 42.4 from the original
Deuteranopia#979692no green cones; the most common form, about 1% of men; ΔE 43.1 from the original
Tritanopia#00B1A6no blue cones; rare, and affects men and women equally; ΔE 11.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.76:1WCAG large text: Fail
Contrast with black, large text7.6:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 12.8Light seagreen · ΔE 13.5Medium seagreen · ΔE 19.2Sea green · ΔE 19.4Turquoise · ΔE 19.7Medium turquoise · ΔE 19.9
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 12.81, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF2140
Analogous#21AF49, #2187AF
Triadic#9021AF, #AF9021
Split complementary#AF2187, #AF4921
Tetradic#4921AF, #AF2140, #87AF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADEFE1
Lighter +30%#82E7D1
Lighter +20%#57DFC1
Lighter +10%#2CD7B2
Darker −10%#19846D
Darker −20%#115949
Darker −30%#092E26
Darker −40%#010303
More saturated +25%#07C99F
Less saturated −25%#3B9581

Channel breakdown

R33
G175
B144
Red33 (12.9%)
Green175 (68.6%)
Blue144 (56.5%)
Hue166.9°
Saturation (HSL)68.27%
Lightness40.78%
Dominant channelGreen
Hex per channelR 21 · G AF · B 90

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Every value on this page was computed from “21af90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.