Recognised as Colour
#CA2800
- #CA2800
- Red
- Dark
- Nearest: Orange red
#CA2800 is a red with RGB values 202, 40, 0 and HSL 12°, 100%, 40%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#CA2800#CA2800
HEX#CA2800
RGBrgb(202, 40, 0)
RGB (0–1)0.7922, 0.1569, 0
RGB percentages79.2%, 15.7%, 0%
HSLhsl(11.9, 100%, 39.6%)
HSV / HSBhsv(11.9, 100%, 79.2%)
CMYK0%, 80.2%, 100%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,248,512
CSS custom property--colour: #CA2800;
Brightness & contrast
Relative luminance0.14074WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.5:1
Contrast with white5.5:1WCAG normal text: AA
Contrast with black3.81:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#35D7FF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.5:1WCAG large text: AAA
Contrast with black, large text3.81:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00A2CA
Analogous#CA003D, #CA8D00
Triadic#00CA28, #2800CA
Split complementary#00CA8D, #003DCA
Tetradic#3DCA00, #00A2CA, #8D00CA
Tints, shades & saturation
Channel breakdown
R202
G40
B0
Red202 (79.2%)
Green40 (15.7%)
Blue0 (0%)
Hue11.88°
Saturation (HSL)100%
Lightness39.61%
Dominant channelRed
Hex per channelR CA · G 28 · B 00
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Also reads as
Ca2800 (chemical formula)
- Formula
- 112,218.4 g/mol
- 2800 atoms
Ca2800 has a molar mass of 112,218.4 g/mol, made up of 2800 atoms across 1 element: 2800 × Ca.
Molar mass
Molar mass112,218.4 g/mol
Total atoms per molecule2800
Distinct elements1
Mass of one molecule1.8634304 × 10^-19 g
Molecules per gram5.3664468 × 10^18
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
Ca100%
Calcium (Ca × 2800)112,218.4 g/mol, 100%
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