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Recognised as Colour

#51AEAF

  • #51AEAF
  • Cyan
  • Dark
  • Nearest: Cadetblue

#51AEAF is a cyan with RGB values 81, 174, 175 and HSL 181°, 37%, 50%. It is a dark colour, so black text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Cadetblue.

Colour values

#51AEAF#51AEAF
HEX#51AEAF
RGBrgb(81, 174, 175)
RGB (0–1)0.3176, 0.6824, 0.6863
RGB percentages31.8%, 68.2%, 68.6%
HSLhsl(180.6, 37%, 50.2%)
HSV / HSBhsv(180.6, 53.7%, 68.6%)
CMYK53.7%, 0.6%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,353,135
CSS custom property--colour: #51AEAF;

Brightness & contrast

Relative luminance0.35117WCAG 2.x, 0 is black and 1 is white
Perceived brightness152.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.02:1
Contrast with white2.62:1WCAG normal text: Fail
Contrast with black8.02:1WCAG normal text: AAA
Greyscale equivalent#9A9A9A
Inverted#AE5150

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A4A7AFno red cones; affects about 1% of men; ΔE 28.1 from the original
Deuteranopia#949BB0no green cones; the most common form, about 1% of men; ΔE 29.2 from the original
Tritanopia#00B3AEno blue cones; rare, and affects men and women equally; ΔE 11.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.62:1WCAG large text: Fail
Contrast with black, large text8.02:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 8.9Light seagreen · ΔE 10.8Dark cyan · ΔE 14.1Medium turquoise · ΔE 15.1Dark turquoise · ΔE 16.7Teal · ΔE 17.7
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 8.88, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF5251
Analogous#51AF81, #517FAF
Triadic#AF51AE, #AEAF51
Split complementary#AF517F, #AF8151
Tetradic#8151AF, #AF5251, #7FAF51

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDEFEF
Lighter +30%#BADFDF
Lighter +20%#97CFCF
Lighter +10%#74BEBF
Darker −10%#418C8C
Darker −20%#316969
Darker −30%#204647
Darker −40%#102324
More saturated +25%#31CDCF
Less saturated −25%#718F8F

Channel breakdown

R81
G174
B175
Red81 (31.8%)
Green174 (68.2%)
Blue175 (68.6%)
Hue180.64°
Saturation (HSL)37.01%
Lightness50.2%
Dominant channelBlue
Hex per channelR 51 · G AE · B AF

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Every value on this page was computed from “51aeaf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.