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Recognised as Colour

#21523A

  • #21523A
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#21523A is a cyan with RGB values 33, 82, 58 and HSL 151°, 43%, 23%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#21523A#21523A
HEX#21523A
RGBrgb(33, 82, 58)
RGB (0–1)0.1294, 0.3216, 0.2275
RGB percentages12.9%, 32.2%, 22.7%
HSLhsl(150.6, 42.6%, 22.5%)
HSV / HSBhsv(150.6, 59.8%, 32.2%)
CMYK59.8%, 0%, 29.3%, 67.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,183,738
CSS custom property--colour: #21523A;

Brightness & contrast

Relative luminance0.06663WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9:1
Contrast with white9:1WCAG normal text: AAA
Contrast with black2.33:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#DEADC5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#514C39no red cones; affects about 1% of men; ΔE 21.9 from the original
Deuteranopia#4A473Bno green cones; the most common form, about 1% of men; ΔE 22 from the original
Tritanopia#10524Bno blue cones; rare, and affects men and women equally; ΔE 11 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9:1WCAG large text: AAA
Contrast with black, large text2.33:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.2Dark olivegreen · ΔE 24.5Teal · ΔE 25.3Dim grey · ΔE 28.2Sea green · ΔE 28.6Dark cyan · ΔE 28.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.19, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#522139
Analogous#215221, #215252
Triadic#3A2152, #523A21
Split complementary#522152, #522121
Tetradic#212152, #522139, #525221

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#77C8A0
Lighter +30%#52BA87
Lighter +20%#3E9B6D
Lighter +10%#307654
Darker −10%#122E20
Darker −20%#040907
Darker −30%#000000
Darker −40%#000000
More saturated +25%#13603A
Less saturated −25%#2F443A

Channel breakdown

R33
G82
B58
Red33 (12.9%)
Green82 (32.2%)
Blue58 (22.7%)
Hue150.61°
Saturation (HSL)42.61%
Lightness22.55%
Dominant channelGreen
Hex per channelR 21 · G 52 · B 3A

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Every value on this page was computed from “21523a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.