Recognised as Colour
#A3000B
- #A3000B
- Red
- Dark
- Nearest: Firebrick
#A3000B is a red with RGB values 163, 0, 11 and HSL 356°, 100%, 32%. It is a dark colour, so white text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#A3000B#A3000B
HEX#A3000B
RGBrgb(163, 0, 11)
RGB (0–1)0.6392, 0, 0.0431
RGB percentages63.9%, 0%, 4.3%
HSLhsl(356, 100%, 32%)
HSV / HSBhsv(356, 100%, 63.9%)
CMYK0%, 100%, 93.3%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,682,379
CSS custom property--colour: #A3000B;
Brightness & contrast
Relative luminance0.07811WCAG 2.x, 0 is black and 1 is white
Perceived brightness89.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.2:1
Contrast with white8.2:1WCAG normal text: AAA
Contrast with black2.56:1WCAG normal text: Fail
Greyscale equivalent#232323
Inverted#5CFFF4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.2:1WCAG large text: AAA
Contrast with black, large text2.56:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00A398
Analogous#A3005D, #A34700
Triadic#0BA300, #000BA3
Split complementary#00A346, #005DA3
Tetradic#5CA300, #00A398, #4600A3
Tints, shades & saturation
Channel breakdown
R163
G0
B11
Red163 (63.9%)
Green0 (0%)
Blue11 (4.3%)
Hue355.95°
Saturation (HSL)100%
Lightness31.96%
Dominant channelRed
Hex per channelR A3 · G 00 · B 0B
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page