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Recognised as Colour

#51489A

  • #51489A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#51489A is a blue with RGB values 81, 72, 154 and HSL 247°, 36%, 44%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#51489A#51489A
HEX#51489A
RGBrgb(81, 72, 154)
RGB (0–1)0.3176, 0.2824, 0.6039
RGB percentages31.8%, 28.2%, 60.4%
HSLhsl(246.6, 36.3%, 44.3%)
HSV / HSBhsv(246.6, 53.2%, 60.4%)
CMYK47.4%, 53.2%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,327,002
CSS custom property--colour: #51489A;

Brightness & contrast

Relative luminance0.08717WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.65:1
Contrast with white7.65:1WCAG normal text: AAA
Contrast with black2.74:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#AEB765

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#20569Dno red cones; affects about 1% of men; ΔE 17.2 from the original
Deuteranopia#1D5198no green cones; the most common form, about 1% of men; ΔE 16.1 from the original
Tritanopia#395A6Ano blue cones; rare, and affects men and women equally; ΔE 45.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.65:1WCAG large text: AAA
Contrast with black, large text2.74:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 4.9Rebecca purple · ΔE 17.5Slate blue · ΔE 19.9Midnight blue · ΔE 21.2Medium purple · ΔE 23.2Royal blue · ΔE 24.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 4.91, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#919A48
Analogous#48689A, #7A489A
Triadic#9A5148, #489A51
Split complementary#9A7A48, #689A48
Tetradic#9A4868, #919A48, #489A7A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CCC8E6
Lighter +30%#ABA6D5
Lighter +20%#8A83C5
Lighter +10%#6A60B5
Darker −10%#3F3877
Darker −20%#2C2854
Darker −30%#1A1732
Darker −40%#08070F
More saturated +25%#3B2CB6
Less saturated −25%#67647E

Channel breakdown

R81
G72
B154
Red81 (31.8%)
Green72 (28.2%)
Blue154 (60.4%)
Hue246.59°
Saturation (HSL)36.28%
Lightness44.31%
Dominant channelBlue
Hex per channelR 51 · G 48 · B 9A

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Every value on this page was computed from “51489a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.