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Colour

#280A3B

  • #280A3B
  • Violet
  • Dark
  • Nearest: Midnight blue

#280A3B is a violet with RGB values 40, 10, 59 and HSL 277°, 71%, 14%. It is a dark colour, so white text on it reaches 17.5:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#280A3B#280A3B
HEX#280A3B
RGBrgb(40, 10, 59)
RGB (0–1)0.1569, 0.0392, 0.2314
RGB percentages15.7%, 3.9%, 23.1%
HSLhsl(276.7, 71%, 13.5%)
HSV / HSBhsv(276.7, 83.1%, 23.1%)
CMYK32.2%, 83.1%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,624,059
CSS custom property--colour: #280A3B;

Brightness & contrast

Relative luminance0.00984WCAG 2.x, 0 is black and 1 is white
Perceived brightness30.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.55:1
Contrast with white17.55:1WCAG normal text: AAA
Contrast with black1.2:1WCAG normal text: Fail
Greyscale equivalent#141414
Inverted#D7F5C4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00183Cno red cones; affects about 1% of men; ΔE 17.9 from the original
Deuteranopia#011A3Ano green cones; the most common form, about 1% of men; ΔE 20.4 from the original
Tritanopia#251521no blue cones; rare, and affects men and women equally; ΔE 24.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.55:1WCAG large text: AAA
Contrast with black, large text1.2:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 26.4Dark slateblue · ΔE 27.9Black · ΔE 36.7Rebecca purple · ΔE 37.1Indigo · ΔE 40.4Purple · ΔE 41.1
Nearest named CSS colourMidnight blue (#191970)ΔE 26.4, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1D3B0A
Analogous#100A3B, #3B0A35
Triadic#3B280A, #0A3B28
Split complementary#363B0A, #0A3B10
Tetradic#3B100A, #1D3B0A, #0A353B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9B34DD
Lighter +30%#8120BE
Lighter +20%#631992
Lighter +10%#461167
Darker −10%#0A030F
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#2A0144
Less saturated −25%#261332

Channel breakdown

R40
G10
B59
Red40 (15.7%)
Green10 (3.9%)
Blue59 (23.1%)
Hue276.73°
Saturation (HSL)71.01%
Lightness13.53%
Dominant channelBlue
Hex per channelR 28 · G 0A · B 3B

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Every value on this page was computed from “280a3b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.