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Colour

#21979F

  • #21979F
  • Cyan
  • Dark
  • Nearest: Dark cyan

#21979F is a cyan with RGB values 33, 151, 159 and HSL 184°, 66%, 38%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Dark cyan.

Colour values

#21979F#21979F
HEX#21979F
RGBrgb(33, 151, 159)
RGB (0–1)0.1294, 0.5922, 0.6235
RGB percentages12.9%, 59.2%, 62.4%
HSLhsl(183.8, 65.6%, 37.6%)
HSV / HSBhsv(183.8, 79.2%, 62.4%)
CMYK79.2%, 5%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,201,503
CSS custom property--colour: #21979F;

Brightness & contrast

Relative luminance0.2496WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.99:1
Contrast with white3.5:1WCAG normal text: Fail
Contrast with black5.99:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#DE6860

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8B90A0no red cones; affects about 1% of men; ΔE 29.9 from the original
Deuteranopia#79839Fno green cones; the most common form, about 1% of men; ΔE 30.9 from the original
Tritanopia#009D99no blue cones; rare, and affects men and women equally; ΔE 8.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.5:1WCAG large text: AA
Contrast with black, large text5.99:1WCAG large text: AAA

Named colours

Dark cyan · ΔE 7Teal · ΔE 10Cadetblue · ΔE 10.9Light seagreen · ΔE 14.7Dark turquoise · ΔE 21.9Medium turquoise · ΔE 22.5
Nearest named CSS colourDark cyan (#008B8B)ΔE 6.95, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9F2921
Analogous#219F68, #21589F
Triadic#9F2197, #979F21
Split complementary#9F2158, #9F6821
Tetradic#68219F, #9F2921, #589F21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A1E7EB
Lighter +30%#76DCE3
Lighter +20%#4CD1DA
Lighter +10%#2ABFC9
Darker −10%#186F75
Darker −20%#0F474B
Darker −30%#071F20
Darker −40%#000000
More saturated +25%#09ACB7
Less saturated −25%#398287

Channel breakdown

R33
G151
B159
Red33 (12.9%)
Green151 (59.2%)
Blue159 (62.4%)
Hue183.81°
Saturation (HSL)65.63%
Lightness37.65%
Dominant channelBlue
Hex per channelR 21 · G 97 · B 9F

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Every value on this page was computed from “21979f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.