Recognised as Colour
#FF3912
- #FF3912
- Red
- Dark
- Nearest: Orange red
#FF3912 is a red with RGB values 255, 57, 18 and HSL 10°, 100%, 54%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#FF3912#FF3912
HEX#FF3912
RGBrgb(255, 57, 18)
RGB (0–1)1, 0.2235, 0.0706
RGB percentages100%, 22.4%, 7.1%
HSLhsl(9.9, 100%, 53.5%)
HSV / HSBhsv(9.9, 92.9%, 100%)
CMYK0%, 77.6%, 92.9%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,726,290
CSS custom property--colour: #FF3912;
Brightness & contrast
Relative luminance0.2423WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.85:1
Contrast with white3.59:1WCAG normal text: Fail
Contrast with black5.85:1WCAG normal text: AA
Greyscale equivalent#606060
Inverted#00C6ED
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.59:1WCAG large text: AA
Contrast with black, large text5.85:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#12D8FF
Analogous#FF1262, #FFB012
Triadic#12FF39, #3912FF
Split complementary#12FFB0, #1262FF
Tetradic#62FF12, #12D8FF, #B012FF
Tints, shades & saturation
Channel breakdown
R255
G57
B18
Red255 (100%)
Green57 (22.4%)
Blue18 (7.1%)
Hue9.87°
Saturation (HSL)100%
Lightness53.53%
Dominant channelRed
Hex per channelR FF · G 39 · B 12
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Also reads as
FF3912 (chemical formula)
- Formula
- 74,339.174 g/mol
- 3913 atoms
FF3912 has a molar mass of 74,339.174 g/mol, made up of 3913 atoms across 1 element: 3913 × F.
Molar mass
Molar mass74,339.174 g/mol
Total atoms per molecule3913
Distinct elements1
Mass of one molecule1.234431 × 10^-19 g
Molecules per gram8.1008981 × 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
F100%
Fluorine (F × 3913)74,339.174 g/mol, 100%
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