Recognised as Colour
#CA283B
- #CA283B
- Red
- Dark
- Nearest: Crimson
#CA283B is a red with RGB values 202, 40, 59 and HSL 353°, 67%, 47%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#CA283B#CA283B
HEX#CA283B
RGBrgb(202, 40, 59)
RGB (0–1)0.7922, 0.1569, 0.2314
RGB percentages79.2%, 15.7%, 23.1%
HSLhsl(353, 66.9%, 47.5%)
HSV / HSBhsv(353, 80.2%, 79.2%)
CMYK0%, 80.2%, 70.8%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,248,571
CSS custom property--colour: #CA283B;
Brightness & contrast
Relative luminance0.1439WCAG 2.x, 0 is black and 1 is white
Perceived brightness116.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.42:1
Contrast with white5.42:1WCAG normal text: AA
Contrast with black3.88:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#35D7C4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.42:1WCAG large text: AAA
Contrast with black, large text3.88:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#28CAB7
Analogous#CA288C, #CA6628
Triadic#3BCA28, #283BCA
Split complementary#28CA66, #288CCA
Tetradic#8CCA28, #28CAB7, #6628CA
Tints, shades & saturation
Channel breakdown
R202
G40
B59
Red202 (79.2%)
Green40 (15.7%)
Blue59 (23.1%)
Hue352.96°
Saturation (HSL)66.94%
Lightness47.45%
Dominant channelRed
Hex per channelR CA · G 28 · B 3B
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Also reads as
Ca283B (chemical formula)
- Formula
- 11,352.884 g/mol
- 284 atoms
Ca283B has a molar mass of 11,352.884 g/mol, made up of 284 atoms across 2 elements: 283 × Ca, 1 × B.
Molar mass
Molar mass11,352.884 g/mol
Total atoms per molecule284
Distinct elements2
Mass of one molecule1.8851907 × 10^-20 g
Molecules per gram5.304503 × 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
Ca99.9%
B0.1%
Calcium (Ca × 283)11,342.074 g/mol, 99.905%
Boron (B)10.81 g/mol, 0.095%
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