Colour
#B30000
- #B30000
- Red
- Dark
- Nearest: Firebrick
#B30000 is a red with RGB values 179, 0, 0 and HSL 0°, 100%, 35%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#B30000#B30000
HEX#B30000
RGBrgb(179, 0, 0)
RGB (0–1)0.702, 0, 0
RGB percentages70.2%, 0%, 0%
HSLhsl(0, 100%, 35.1%)
HSV / HSBhsv(0, 100%, 70.2%)
CMYK0%, 100%, 100%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,730,944
CSS custom property--colour: #B30000;
Brightness & contrast
Relative luminance0.09584WCAG 2.x, 0 is black and 1 is white
Perceived brightness97.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.2:1
Contrast with white7.2:1WCAG normal text: AAA
Contrast with black2.92:1WCAG normal text: Fail
Greyscale equivalent#262626
Inverted#4CFFFF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.2:1WCAG large text: AAA
Contrast with black, large text2.92:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00B3B3
Analogous#B3005A, #B35A00
Triadic#00B300, #0000B3
Split complementary#00B35A, #005AB3
Tetradic#5AB300, #00B3B3, #5A00B3
Tints, shades & saturation
Channel breakdown
R179
G0
B0
Red179 (70.2%)
Green0 (0%)
Blue0 (0%)
Hue0°
Saturation (HSL)100%
Lightness35.1%
Dominant channelRed
Hex per channelR B3 · G 00 · B 00
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