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Colour

#090021

  • #090021
  • Violet
  • Dark
  • Nearest: Black

#090021 is a violet with RGB values 9, 0, 33 and HSL 256°, 100%, 6%. It is a dark colour, so white text on it reaches 20.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#090021#090021
HEX#090021
RGBrgb(9, 0, 33)
RGB (0–1)0.0353, 0, 0.1294
RGB percentages3.5%, 0%, 12.9%
HSLhsl(256.4, 100%, 6.5%)
HSV / HSBhsv(256.4, 100%, 12.9%)
CMYK72.7%, 100%, 0%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer589,857
CSS custom property--colour: #090021;

Brightness & contrast

Relative luminance0.00168WCAG 2.x, 0 is black and 1 is white
Perceived brightness12.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.32:1
Contrast with white20.32:1WCAG normal text: AAA
Contrast with black1.03:1WCAG normal text: Fail
Greyscale equivalent#040404
Inverted#F6FFDE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000622no red cones; affects about 1% of men; ΔE 4.5 from the original
Deuteranopia#000520no green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#02070Fno blue cones; rare, and affects men and women equally; ΔE 16.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.32:1WCAG large text: AAA
Contrast with black, large text1.03:1WCAG large text: Fail

Named colours

Black · ΔE 19.6Dark slate grey · ΔE 38.8Midnight blue · ΔE 41.9Dark slateblue · ΔE 41.9Dim grey · ΔE 47.2Slate grey · ΔE 53
Nearest named CSS colourBlack (#000000)ΔE 19.63, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#182100
Analogous#000721, #190021
Triadic#210900, #002109
Split complementary#211A00, #072100
Tetradic#210008, #182100, #00211A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4100ED
Lighter +30%#3300BA
Lighter +20%#250087
Lighter +10%#170054
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#090021
Less saturated −25%#0B041D

Channel breakdown

R9
G0
B33
Red9 (3.5%)
Green0 (0%)
Blue33 (12.9%)
Hue256.36°
Saturation (HSL)100%
Lightness6.47%
Dominant channelBlue
Hex per channelR 09 · G 00 · B 21

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Every value on this page was computed from “hex 090021” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.