Recognised as Colour
#CD3637
- #CD3637
- Red
- Dark
- Nearest: Firebrick
#CD3637 is a red with RGB values 205, 54, 55 and HSL 360°, 60%, 51%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#CD3637#CD3637
HEX#CD3637
RGBrgb(205, 54, 55)
RGB (0–1)0.8039, 0.2118, 0.2157
RGB percentages80.4%, 21.2%, 21.6%
HSLhsl(359.6, 60.2%, 50.8%)
HSV / HSBhsv(359.6, 73.7%, 80.4%)
CMYK0%, 73.7%, 73.2%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,448,759
CSS custom property--colour: #CD3637;
Brightness & contrast
Relative luminance0.15893WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.03:1
Contrast with white5.03:1WCAG normal text: AA
Contrast with black4.18:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#32C9C8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.03:1WCAG large text: AAA
Contrast with black, large text4.18:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#36CDCC
Analogous#CD3682, #CD8136
Triadic#37CD36, #3637CD
Split complementary#36CD81, #3682CD
Tetradic#82CD36, #36CDCC, #8136CD
Tints, shades & saturation
Channel breakdown
R205
G54
B55
Red205 (80.4%)
Green54 (21.2%)
Blue55 (21.6%)
Hue359.6°
Saturation (HSL)60.16%
Lightness50.78%
Dominant channelRed
Hex per channelR CD · G 36 · B 37
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Also reads as
Cd3637 (chemical formula)
- Formula
- 408,835.17 g/mol
- 3637 atoms
Cd3637 has a molar mass of 408,835.17 g/mol, made up of 3637 atoms across 1 element: 3637 × Cd.
Molar mass
Molar mass408,835.17 g/mol
Total atoms per molecule3637
Distinct elements1
Mass of one molecule6.7888677 × 10^-19 g
Molecules per gram1.4729997 × 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
Cd100%
Cadmium (Cd × 3637)408,835.17 g/mol, 100%
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