Colour
#010000
- #010000
- Red
- Dark
- Nearest: Black
#010000 is a red with RGB values 1, 0, 0 and HSL 0°, 100%, 0%. It is a dark colour, so white text on it reaches 21:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#010000#010000
HEX#010000
RGBrgb(1, 0, 0)
RGB (0–1)0.0039, 0, 0
RGB percentages0.4%, 0%, 0%
HSLhsl(0, 100%, 0.2%)
HSV / HSBhsv(0, 100%, 0.4%)
CMYK0%, 100%, 100%, 99.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer65,536
CSS custom property--colour: #010000;
Brightness & contrast
Relative luminance0.00006WCAG 2.x, 0 is black and 1 is white
Perceived brightness0.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.97:1
Contrast with white20.97:1WCAG normal text: AAA
Contrast with black1:1WCAG normal text: Fail
Greyscale equivalent#000000
Inverted#FEFFFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.97:1WCAG large text: AAA
Contrast with black, large text1:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#000101
Analogous#010001, #010100
Triadic#000100, #000001
Split complementary#000101, #000101
Tetradic#010100, #000101, #010001
Tints, shades & saturation
Channel breakdown
R1
G0
B0
Red1 (0.4%)
Green0 (0%)
Blue0 (0%)
Hue0°
Saturation (HSL)100%
Lightness0.2%
Dominant channelRed
Hex per channelR 01 · G 00 · B 00
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