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Recognised as Colour

#51556E

  • #51556E
  • Blue
  • Dark
  • Nearest: Dim grey

#51556E is a blue with RGB values 81, 85, 110 and HSL 232°, 15%, 37%. It is a dark colour, so white text on it reaches 7.3:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#51556E#51556E
HEX#51556E
RGBrgb(81, 85, 110)
RGB (0–1)0.3176, 0.3333, 0.4314
RGB percentages31.8%, 33.3%, 43.1%
HSLhsl(231.7, 15.2%, 37.5%)
HSV / HSBhsv(231.7, 26.4%, 43.1%)
CMYK26.4%, 22.7%, 0%, 56.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,330,286
CSS custom property--colour: #51556E;

Brightness & contrast

Relative luminance0.09372WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.31:1
Contrast with white7.31:1WCAG normal text: AAA
Contrast with black2.87:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#AEAA91

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4E576Fno red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#4C556Dno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#4A5A5Dno blue cones; rare, and affects men and women equally; ΔE 14.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.31:1WCAG large text: AAA
Contrast with black, large text2.87:1WCAG large text: Fail

Named colours

Dim grey · ΔE 17.3Slate grey · ΔE 18Dark slate grey · ΔE 20.4Light slate grey · ΔE 20.7Gray · ΔE 22.9Steel blue · ΔE 25
Nearest named CSS colourDim grey (#696969)ΔE 17.33, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6E6A51
Analogous#51636E, #5C516E
Triadic#6E5155, #556E51
Split complementary#6E5C51, #636E51
Tetradic#6E5163, #6E6A51, #516E5C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BDBFCE
Lighter +30%#9FA3B9
Lighter +20%#8287A3
Lighter +10%#676C8B
Darker −10%#3B3E51
Darker −20%#262833
Darker −30%#101116
Darker −40%#000000
More saturated +25%#394486
Less saturated −25%#606060

Channel breakdown

R81
G85
B110
Red81 (31.8%)
Green85 (33.3%)
Blue110 (43.1%)
Hue231.72°
Saturation (HSL)15.18%
Lightness37.45%
Dominant channelBlue
Hex per channelR 51 · G 55 · B 6E

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Every value on this page was computed from “51556e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.