Colour
#400A21
- #400A21
- Red
- Dark
- Nearest: Black
#400A21 is a red with RGB values 64, 10, 33 and HSL 334°, 73%, 15%. It is a dark colour, so white text on it reaches 16.4:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#400A21#400A21
HEX#400A21
RGBrgb(64, 10, 33)
RGB (0–1)0.251, 0.0392, 0.1294
RGB percentages25.1%, 3.9%, 12.9%
HSLhsl(334.4, 73%, 14.5%)
HSV / HSBhsv(334.4, 84.4%, 25.1%)
CMYK0%, 84.4%, 48.4%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,196,897
CSS custom property--colour: #400A21;
Brightness & contrast
Relative luminance0.01417WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.36:1
Contrast with white16.36:1WCAG normal text: AAA
Contrast with black1.28:1WCAG normal text: Fail
Greyscale equivalent#171717
Inverted#BFF5DE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.36:1WCAG large text: AAA
Contrast with black, large text1.28:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#0A4029
Analogous#400A3C, #400E0A
Triadic#21400A, #0A2140
Split complementary#0A400E, #0A3C40
Tetradic#3C400A, #0A4029, #0E0A40
Tints, shades & saturation
Channel breakdown
R64
G10
B33
Red64 (25.1%)
Green10 (3.9%)
Blue33 (12.9%)
Hue334.44°
Saturation (HSL)72.97%
Lightness14.51%
Dominant channelRed
Hex per channelR 40 · G 0A · B 21
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