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Recognised as Colour

#280D57

  • #280D57
  • Violet
  • Dark
  • Nearest: Midnight blue

#280D57 is a violet with RGB values 40, 13, 87 and HSL 262°, 74%, 20%. It is a dark colour, so white text on it reaches 16.3:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#280D57#280D57
HEX#280D57
RGBrgb(40, 13, 87)
RGB (0–1)0.1569, 0.051, 0.3412
RGB percentages15.7%, 5.1%, 34.1%
HSLhsl(261.9, 74%, 19.6%)
HSV / HSBhsv(261.9, 85.1%, 34.1%)
CMYK54%, 85.1%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,624,855
CSS custom property--colour: #280D57;

Brightness & contrast

Relative luminance0.01427WCAG 2.x, 0 is black and 1 is white
Perceived brightness38 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.34:1
Contrast with white16.34:1WCAG normal text: AAA
Contrast with black1.29:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#D7F2A8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002159no red cones; affects about 1% of men; ΔE 18 from the original
Deuteranopia#001E56no green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#182232no blue cones; rare, and affects men and women equally; ΔE 41.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.34:1WCAG large text: AAA
Contrast with black, large text1.29:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 11.1Dark slateblue · ΔE 19.8Rebecca purple · ΔE 24.8Indigo · ΔE 25.7Navy · ΔE 30Purple · ΔE 32.3
Nearest named CSS colourMidnight blue (#191970)ΔE 11.14, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3C570D
Analogous#0D1757, #4D0D57
Triadic#57280D, #0D5728
Split complementary#574D0D, #17570D
Tetradic#570D17, #3C570D, #0D574D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#834CE4
Lighter +30%#6521DC
Lighter +20%#511AB0
Lighter +10%#3C1483
Darker −10%#14062B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#250064
Less saturated −25%#2B194B

Channel breakdown

R40
G13
B87
Red40 (15.7%)
Green13 (5.1%)
Blue87 (34.1%)
Hue261.89°
Saturation (HSL)74%
Lightness19.61%
Dominant channelBlue
Hex per channelR 28 · G 0D · B 57

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Every value on this page was computed from “280d57” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.