Recognised as Colour
#CB2530
- #CB2530
- Red
- Dark
- Nearest: Firebrick
#CB2530 is a red with RGB values 203, 37, 48 and HSL 356°, 69%, 47%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#CB2530#CB2530
HEX#CB2530
RGBrgb(203, 37, 48)
RGB (0–1)0.7961, 0.1451, 0.1882
RGB percentages79.6%, 14.5%, 18.8%
HSLhsl(356, 69.2%, 47.1%)
HSV / HSBhsv(356, 81.8%, 79.6%)
CMYK0%, 81.8%, 76.4%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,313,328
CSS custom property--colour: #CB2530;
Brightness & contrast
Relative luminance0.14233WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.46:1
Contrast with white5.46:1WCAG normal text: AA
Contrast with black3.85:1WCAG normal text: Fail
Greyscale equivalent#494949
Inverted#34DACF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.46:1WCAG large text: AAA
Contrast with black, large text3.85:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#25CBC0
Analogous#CB2583, #CB6D25
Triadic#30CB25, #2530CB
Split complementary#25CB6D, #2583CB
Tetradic#83CB25, #25CBC0, #6D25CB
Tints, shades & saturation
Channel breakdown
R203
G37
B48
Red203 (79.6%)
Green37 (14.5%)
Blue48 (18.8%)
Hue356.02°
Saturation (HSL)69.17%
Lightness47.06%
Dominant channelRed
Hex per channelR CB · G 25 · B 30
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Also reads as
CB2530 (chemical formula)
- Formula
- 27,361.311 g/mol
- 2531 atoms
CB2530 has a molar mass of 27,361.311 g/mol, made up of 2531 atoms across 2 elements: 1 × C, 2530 × B.
Molar mass
Molar mass27,361.311 g/mol
Total atoms per molecule2531
Distinct elements2
Mass of one molecule4.5434526 × 10^-20 g
Molecules per gram2.2009694 × 10^19
Name
NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show
Composition by mass
C0%
B100%
Carbon (C)12.011 g/mol, 0.044%
Boron (B × 2530)27,349.3 g/mol, 99.956%
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