Recognised as Colour
#FB8F20
- #FB8F20
- Orange
- Dark
- Nearest: Dark orange
#FB8F20 is a orange with RGB values 251, 143, 32 and HSL 30°, 96%, 55%. It is a dark colour, so black text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark orange.
Colour values
#FB8F20#FB8F20
HEX#FB8F20
RGBrgb(251, 143, 32)
RGB (0–1)0.9843, 0.5608, 0.1255
RGB percentages98.4%, 56.1%, 12.5%
HSLhsl(30.4, 96.5%, 55.5%)
HSV / HSBhsv(30.4, 87.3%, 98.4%)
CMYK0%, 43%, 87.3%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,486,176
CSS custom property--colour: #FB8F20;
Brightness & contrast
Relative luminance0.40258WCAG 2.x, 0 is black and 1 is white
Perceived brightness175.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.05:1
Contrast with white2.32:1WCAG normal text: Fail
Contrast with black9.05:1WCAG normal text: AAA
Greyscale equivalent#9E9E9E
Inverted#0470DF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.32:1WCAG large text: Fail
Contrast with black, large text9.05:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#208CFB
Analogous#FB2120, #FAFB20
Triadic#20FB8F, #8F20FB
Split complementary#20FAFB, #2120FB
Tetradic#20FB21, #208CFB, #FB20FA
Tints, shades & saturation
Channel breakdown
R251
G143
B32
Red251 (98.4%)
Green143 (56.1%)
Blue32 (12.5%)
Hue30.41°
Saturation (HSL)96.48%
Lightness55.49%
Dominant channelRed
Hex per channelR FB · G 8F · B 20
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Also reads as
FB8F20 (chemical formula)
- Formula
- 485.438 g/mol
- 29 atoms
FB8F20 has a molar mass of 485.438 g/mol, made up of 29 atoms across 2 elements: 21 × F, 8 × B.
Molar mass
Molar mass485.438 g/mol
Total atoms per molecule29
Distinct elements2
Mass of one molecule8.0608876 × 10^-22 g
Molecules per gram1.2405582 × 10^21
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
F82.2%
B17.8%
Fluorine (F × 21)398.958 g/mol, 82.185%
Boron (B × 8)86.48 g/mol, 17.815%
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