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Colour

#000A21

  • #000A21
  • Blue
  • Dark
  • Nearest: Black

#000A21 is a blue with RGB values 0, 10, 33 and HSL 222°, 100%, 6%. It is a dark colour, so white text on it reaches 19.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#000A21#000A21
HEX#000A21
RGBrgb(0, 10, 33)
RGB (0–1)0, 0.0392, 0.1294
RGB percentages0%, 3.9%, 12.9%
HSLhsl(221.8, 100%, 6.5%)
HSV / HSBhsv(221.8, 100%, 12.9%)
CMYK100%, 69.7%, 0%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,593
CSS custom property--colour: #000A21;

Brightness & contrast

Relative luminance0.00327WCAG 2.x, 0 is black and 1 is white
Perceived brightness13.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.71:1
Contrast with white19.71:1WCAG normal text: AAA
Contrast with black1.07:1WCAG normal text: Fail
Greyscale equivalent#0A0A0A
Inverted#FFF5DE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000D22no red cones; affects about 1% of men; ΔE 1.2 from the original
Deuteranopia#000921no green cones; the most common form, about 1% of men; ΔE 0.5 from the original
Tritanopia#001013no blue cones; rare, and affects men and women equally; ΔE 13.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.71:1WCAG large text: AAA
Contrast with black, large text1.07:1WCAG large text: Fail

Named colours

Black · ΔE 15.6Dark slate grey · ΔE 33.8Dim grey · ΔE 44.2Dark slateblue · ΔE 45.2Midnight blue · ΔE 46.7Slate grey · ΔE 50.3
Nearest named CSS colourBlack (#000000)ΔE 15.64, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#211700
Analogous#001A21, #070021
Triadic#21000A, #0A2100
Split complementary#210700, #1A2100
Tetradic#21001A, #211700, #002107

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#0048ED
Lighter +30%#0038BA
Lighter +20%#002987
Lighter +10%#001954
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000A21
Less saturated −25%#040C1D

Channel breakdown

R0
G10
B33
Red0 (0%)
Green10 (3.9%)
Blue33 (12.9%)
Hue221.82°
Saturation (HSL)100%
Lightness6.47%
Dominant channelBlue
Hex per channelR 00 · G 0A · B 21

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Every value on this page was computed from “000a21” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.