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Colour

#000021

  • #000021
  • Blue
  • Dark
  • Nearest: Black

#000021 is a blue with RGB values 0, 0, 33 and HSL 240°, 100%, 6%. It is a dark colour, so white text on it reaches 20.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#000021#000021
HEX#000021
RGBrgb(0, 0, 33)
RGB (0–1)0, 0, 0.1294
RGB percentages0%, 0%, 12.9%
HSLhsl(240, 100%, 6.5%)
HSV / HSBhsv(240, 100%, 12.9%)
CMYK100%, 100%, 0%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer33
CSS custom property--colour: #000021;

Brightness & contrast

Relative luminance0.0011WCAG 2.x, 0 is black and 1 is white
Perceived brightness11.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.55:1
Contrast with white20.55:1WCAG normal text: AAA
Contrast with black1.02:1WCAG normal text: Fail
Greyscale equivalent#020202
Inverted#FFFFDE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000522no red cones; affects about 1% of men; ΔE 2.1 from the original
Deuteranopia#000220no green cones; the most common form, about 1% of men; ΔE 1.8 from the original
Tritanopia#00070Fno blue cones; rare, and affects men and women equally; ΔE 16 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.55:1WCAG large text: AAA
Contrast with black, large text1.02:1WCAG large text: Fail

Named colours

Black · ΔE 19.4Dark slate grey · ΔE 38.3Midnight blue · ΔE 42.7Dark slateblue · ΔE 42.8Dim grey · ΔE 47.5Slate grey · ΔE 53.2
Nearest named CSS colourBlack (#000000)ΔE 19.38, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#212100
Analogous#001121, #110021
Triadic#210000, #002100
Split complementary#211100, #112100
Tetradic#210011, #212100, #002111

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#0000ED
Lighter +30%#0000BA
Lighter +20%#000087
Lighter +10%#000054
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000021
Less saturated −25%#04041D

Channel breakdown

R0
G0
B33
Red0 (0%)
Green0 (0%)
Blue33 (12.9%)
Hue240°
Saturation (HSL)100%
Lightness6.47%
Dominant channelBlue
Hex per channelR 00 · G 00 · B 21

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Every value on this page was computed from “hex 000021” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.