Recognised as Colour
#FF8B19
- #FF8B19
- Orange
- Dark
- Nearest: Dark orange
#FF8B19 is a orange with RGB values 255, 139, 25 and HSL 30°, 100%, 55%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Dark orange.
Colour values
#FF8B19#FF8B19
HEX#FF8B19
RGBrgb(255, 139, 25)
RGB (0–1)1, 0.5451, 0.098
RGB percentages100%, 54.5%, 9.8%
HSLhsl(29.7, 100%, 54.9%)
HSV / HSBhsv(29.7, 90.2%, 100%)
CMYK0%, 45.5%, 90.2%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,747,289
CSS custom property--colour: #FF8B19;
Brightness & contrast
Relative luminance0.39795WCAG 2.x, 0 is black and 1 is white
Perceived brightness175.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.96:1
Contrast with white2.34:1WCAG normal text: Fail
Contrast with black8.96:1WCAG normal text: AAA
Greyscale equivalent#9B9B9B
Inverted#0074E6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.34:1WCAG large text: Fail
Contrast with black, large text8.96:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#198DFF
Analogous#FF191A, #FFFE19
Triadic#19FF8B, #8B19FF
Split complementary#19FFFE, #191AFF
Tetradic#1AFF19, #198DFF, #FE19FF
Tints, shades & saturation
Channel breakdown
R255
G139
B25
Red255 (100%)
Green139 (54.5%)
Blue25 (9.8%)
Hue29.74°
Saturation (HSL)100%
Lightness54.9%
Dominant channelRed
Hex per channelR FF · G 8B · B 19
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Also reads as
FF8B19 (chemical formula)
- Formula
- 376.372 g/mol
- 28 atoms
FF8B19 has a molar mass of 376.372 g/mol, made up of 28 atoms across 2 elements: 9 × F, 19 × B.
Molar mass
Molar mass376.372 g/mol
Total atoms per molecule28
Distinct elements2
Mass of one molecule6.2498041 × 10^-22 g
Molecules per gram1.6000502 × 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
F45.4%
B54.6%
Fluorine (F × 9)170.982 g/mol, 45.429%
Boron (B × 19)205.39 g/mol, 54.571%
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