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Recognised as Colour

#21798A

  • #21798A
  • Cyan
  • Dark
  • Nearest: Teal

#21798A is a cyan with RGB values 33, 121, 138 and HSL 190°, 61%, 34%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Teal.

Colour values

#21798A#21798A
HEX#21798A
RGBrgb(33, 121, 138)
RGB (0–1)0.1294, 0.4745, 0.5412
RGB percentages12.9%, 47.5%, 54.1%
HSLhsl(189.7, 61.4%, 33.5%)
HSV / HSBhsv(189.7, 76.1%, 54.1%)
CMYK76.1%, 12.3%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,193,802
CSS custom property--colour: #21798A;

Brightness & contrast

Relative luminance0.15833WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.04:1
Contrast with white5.04:1WCAG normal text: AA
Contrast with black4.17:1WCAG normal text: Fail
Greyscale equivalent#686868
Inverted#DE8675

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6D758Bno red cones; affects about 1% of men; ΔE 21.8 from the original
Deuteranopia#5E6A8Ano green cones; the most common form, about 1% of men; ΔE 23 from the original
Tritanopia#00807Eno blue cones; rare, and affects men and women equally; ΔE 13.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.04:1WCAG large text: AAA
Contrast with black, large text4.17:1WCAG large text: AA

Named colours

Teal · ΔE 12.6Dark cyan · ΔE 14.7Cadetblue · ΔE 17.1Slate grey · ΔE 19.2Light slate grey · ΔE 20.1Dark slate grey · ΔE 21.5
Nearest named CSS colourTeal (#008080)ΔE 12.63, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A3221
Analogous#218A66, #21458A
Triadic#8A2179, #798A21
Split complementary#8A2145, #8A6621
Tetradic#66218A, #8A3221, #458A21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#92D8E5
Lighter +30%#69C9DB
Lighter +20%#40BAD1
Lighter +10%#2B9DB3
Darker −10%#175561
Darker −20%#0D3138
Darker −30%#030D0F
Darker −40%#000000
More saturated +25%#0C879F
Less saturated −25%#366B75

Channel breakdown

R33
G121
B138
Red33 (12.9%)
Green121 (47.5%)
Blue138 (54.1%)
Hue189.71°
Saturation (HSL)61.4%
Lightness33.53%
Dominant channelBlue
Hex per channelR 21 · G 79 · B 8A

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Every value on this page was computed from “21798a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.