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Recognised as Colour

#51808D

  • #51808D
  • Cyan
  • Dark
  • Nearest: Slate grey

#51808D is a cyan with RGB values 81, 128, 141 and HSL 193°, 27%, 44%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#51808D#51808D
HEX#51808D
RGBrgb(81, 128, 141)
RGB (0–1)0.3176, 0.502, 0.5529
RGB percentages31.8%, 50.2%, 55.3%
HSLhsl(193, 27%, 43.5%)
HSV / HSBhsv(193, 42.6%, 55.3%)
CMYK42.6%, 9.2%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,341,325
CSS custom property--colour: #51808D;

Brightness & contrast

Relative luminance0.19111WCAG 2.x, 0 is black and 1 is white
Perceived brightness117.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.82:1
Contrast with white4.35:1WCAG normal text: Fail
Contrast with black4.82:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#AE7F72

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#777D8Eno red cones; affects about 1% of men; ΔE 14.1 from the original
Deuteranopia#6E768Dno green cones; the most common form, about 1% of men; ΔE 14.8 from the original
Tritanopia#388584no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.35:1WCAG large text: AA
Contrast with black, large text4.82:1WCAG large text: AAA

Named colours

Slate grey · ΔE 10.5Light slate grey · ΔE 11.4Cadetblue · ΔE 13.5Teal · ΔE 17Gray · ΔE 17.5Dim grey · ΔE 18.4
Nearest named CSS colourSlate grey (#708090)ΔE 10.55, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D5E51
Analogous#518D7C, #51628D
Triadic#8D5180, #808D51
Split complementary#8D5162, #8D7C51
Tetradic#7C518D, #8D5E51, #628D51

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CADBE0
Lighter +30%#A9C6CE
Lighter +20%#89B0BB
Lighter +10%#689BA9
Darker −10%#3E636D
Darker −20%#2C454C
Darker −30%#19282C
Darker −40%#070A0B
More saturated +25%#3590A9
Less saturated −25%#6D7071

Channel breakdown

R81
G128
B141
Red81 (31.8%)
Green128 (50.2%)
Blue141 (55.3%)
Hue193°
Saturation (HSL)27.03%
Lightness43.53%
Dominant channelBlue
Hex per channelR 51 · G 80 · B 8D

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Every value on this page was computed from “51808d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.