Recognised as Colour
#C53B11
- #C53B11
- Red
- Dark
- Nearest: Firebrick
#C53B11 is a red with RGB values 197, 59, 17 and HSL 14°, 84%, 42%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#C53B11#C53B11
HEX#C53B11
RGBrgb(197, 59, 17)
RGB (0–1)0.7725, 0.2314, 0.0667
RGB percentages77.3%, 23.1%, 6.7%
HSLhsl(14, 84.1%, 42%)
HSV / HSBhsv(14, 91.4%, 77.3%)
CMYK0%, 70.1%, 91.4%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,925,713
CSS custom property--colour: #C53B11;
Brightness & contrast
Relative luminance0.15039WCAG 2.x, 0 is black and 1 is white
Perceived brightness117 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.24:1
Contrast with white5.24:1WCAG normal text: AA
Contrast with black4.01:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#3AC4EE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.24:1WCAG large text: AAA
Contrast with black, large text4.01:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#119BC5
Analogous#C51141, #C59511
Triadic#11C53B, #3B11C5
Split complementary#11C595, #1141C5
Tetradic#41C511, #119BC5, #9511C5
Tints, shades & saturation
Channel breakdown
R197
G59
B17
Red197 (77.3%)
Green59 (23.1%)
Blue17 (6.7%)
Hue14°
Saturation (HSL)84.11%
Lightness41.96%
Dominant channelRed
Hex per channelR C5 · G 3B · B 11
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Also reads as
C53B11 (chemical formula)
- Formula
- 755.493 g/mol
- 64 atoms
C53B11 has a molar mass of 755.493 g/mol, made up of 64 atoms across 2 elements: 53 × C, 11 × B.
Molar mass
Molar mass755.493 g/mol
Total atoms per molecule64
Distinct elements2
Mass of one molecule1.2545256 × 10^-21 g
Molecules per gram7.9711404 × 10^20
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
C84.3%
B15.7%
Carbon (C × 53)636.583 g/mol, 84.261%
Boron (B × 11)118.91 g/mol, 15.739%
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