Recognised as Colour
#CD3828
- #CD3828
- Red
- Dark
- Nearest: Firebrick
#CD3828 is a red with RGB values 205, 56, 40 and HSL 6°, 67%, 48%. 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
#CD3828#CD3828
HEX#CD3828
RGBrgb(205, 56, 40)
RGB (0–1)0.8039, 0.2196, 0.1569
RGB percentages80.4%, 22%, 15.7%
HSLhsl(5.8, 67.3%, 48%)
HSV / HSBhsv(5.8, 80.5%, 80.4%)
CMYK0%, 72.7%, 80.5%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,449,256
CSS custom property--colour: #CD3828;
Brightness & contrast
Relative luminance0.15961WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.01:1
Contrast with white5.01:1WCAG normal text: AA
Contrast with black4.19:1WCAG normal text: Fail
Greyscale equivalent#575757
Inverted#32C7D7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.01:1WCAG large text: AAA
Contrast with black, large text4.19:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#28BDCD
Analogous#CD286B, #CD8B28
Triadic#28CD38, #3828CD
Split complementary#28CD8A, #286BCD
Tetradic#6BCD28, #28BDCD, #8A28CD
Tints, shades & saturation
Channel breakdown
R205
G56
B40
Red205 (80.4%)
Green56 (22%)
Blue40 (15.7%)
Hue5.82°
Saturation (HSL)67.35%
Lightness48.04%
Dominant channelRed
Hex per channelR CD · G 38 · B 28
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Also reads as
Cd3828 (chemical formula)
- Formula
- 430,305.48 g/mol
- 3828 atoms
Cd3828 has a molar mass of 430,305.48 g/mol, made up of 3828 atoms across 1 element: 3828 × Cd.
Molar mass
Molar mass430,305.48 g/mol
Total atoms per molecule3828
Distinct elements1
Mass of one molecule7.1453906 × 10^-19 g
Molecules per gram1.3995036 × 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 × 3828)430,305.48 g/mol, 100%
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