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Recognised as Colour

#51AEC0

  • #51AEC0
  • Cyan
  • Dark
  • Nearest: Cadetblue

#51AEC0 is a cyan with RGB values 81, 174, 192 and HSL 190°, 47%, 54%. It is a dark colour, so black text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Cadetblue.

Colour values

#51AEC0#51AEC0
HEX#51AEC0
RGBrgb(81, 174, 192)
RGB (0–1)0.3176, 0.6824, 0.7529
RGB percentages31.8%, 68.2%, 75.3%
HSLhsl(189.7, 46.8%, 53.5%)
HSV / HSBhsv(189.7, 57.8%, 75.3%)
CMYK57.8%, 9.4%, 0%, 24.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,353,152
CSS custom property--colour: #51AEC0;

Brightness & contrast

Relative luminance0.35827WCAG 2.x, 0 is black and 1 is white
Perceived brightness154.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.17:1
Contrast with white2.57:1WCAG normal text: Fail
Contrast with black8.17:1WCAG normal text: AAA
Greyscale equivalent#9C9C9C
Inverted#AE513F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A0A9C1no red cones; affects about 1% of men; ΔE 24.6 from the original
Deuteranopia#8F9CC0no green cones; the most common form, about 1% of men; ΔE 25.9 from the original
Tritanopia#00B6B3no blue cones; rare, and affects men and women equally; ΔE 17.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.57:1WCAG large text: Fail
Contrast with black, large text8.17:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 11.7Sky blue · ΔE 15.3Dark cyan · ΔE 18.5Light seagreen · ΔE 18.9Dark turquoise · ΔE 20.3Medium turquoise · ΔE 20.5
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 11.67, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C06351
Analogous#51C09B, #5176C0
Triadic#C051AE, #AEC051
Split complementary#C05176, #C09B51
Tetradic#9B51C0, #C06351, #76C051

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E7F4F6
Lighter +30%#C1E2E9
Lighter +20%#9CD1DB
Lighter +10%#76BFCE
Darker −10%#3B92A3
Darker −20%#2D717E
Darker −30%#204F58
Darker −40%#122D33
More saturated +25%#33C2DE
Less saturated −25%#6F9AA2

Channel breakdown

R81
G174
B192
Red81 (31.8%)
Green174 (68.2%)
Blue192 (75.3%)
Hue189.73°
Saturation (HSL)46.84%
Lightness53.53%
Dominant channelBlue
Hex per channelR 51 · G AE · B C0

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Every value on this page was computed from “51aec0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.