Recognised as Colour
#F2811B
- #F2811B
- Orange
- Dark
- Nearest: Dark orange
#F2811B is a orange with RGB values 242, 129, 27 and HSL 28°, 89%, 53%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Dark orange.
Colour values
#F2811B#F2811B
HEX#F2811B
RGBrgb(242, 129, 27)
RGB (0–1)0.949, 0.5059, 0.1059
RGB percentages94.9%, 50.6%, 10.6%
HSLhsl(28.5, 89.2%, 52.7%)
HSV / HSBhsv(28.5, 88.8%, 94.9%)
CMYK0%, 46.7%, 88.8%, 5.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,892,763
CSS custom property--colour: #F2811B;
Brightness & contrast
Relative luminance0.34657WCAG 2.x, 0 is black and 1 is white
Perceived brightness165.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.93:1
Contrast with white2.65:1WCAG normal text: Fail
Contrast with black7.93:1WCAG normal text: AAA
Greyscale equivalent#929292
Inverted#0D7EE4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.65:1WCAG large text: Fail
Contrast with black, large text7.93:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#1B8CF2
Analogous#F21B20, #F2ED1B
Triadic#1BF281, #811BF2
Split complementary#1BF2ED, #1B20F2
Tetradic#20F21B, #1B8CF2, #ED1BF2
Tints, shades & saturation
Channel breakdown
R242
G129
B27
Red242 (94.9%)
Green129 (50.6%)
Blue27 (10.6%)
Hue28.47°
Saturation (HSL)89.21%
Lightness52.75%
Dominant channelRed
Hex per channelR F2 · G 81 · B 1B
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Also reads as
F2811B (chemical formula)
- Formula
- 53,414.188 g/mol
- 2812 atoms
F2811B has a molar mass of 53,414.188 g/mol, made up of 2812 atoms across 2 elements: 2811 × F, 1 × B.
Molar mass
Molar mass53,414.188 g/mol
Total atoms per molecule2812
Distinct elements2
Mass of one molecule8.8696346 × 10^-20 g
Molecules per gram1.1274422 × 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
F100%
B0%
Fluorine (F × 2811)53,403.378 g/mol, 99.98%
Boron (B)10.81 g/mol, 0.02%
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