Recognised as Colour
#F12F2B
- #F12F2B
- Red
- Dark
- Nearest: Tomato
#F12F2B is a red with RGB values 241, 47, 43 and HSL 1°, 88%, 56%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#F12F2B#F12F2B
HEX#F12F2B
RGBrgb(241, 47, 43)
RGB (0–1)0.9451, 0.1843, 0.1686
RGB percentages94.5%, 18.4%, 16.9%
HSLhsl(1.2, 87.6%, 55.7%)
HSV / HSBhsv(1.2, 82.2%, 94.5%)
CMYK0%, 80.5%, 82.2%, 5.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,806,251
CSS custom property--colour: #F12F2B;
Brightness & contrast
Relative luminance0.20908WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.18:1
Contrast with white4.05:1WCAG normal text: Fail
Contrast with black5.18:1WCAG normal text: AA
Greyscale equivalent#585858
Inverted#0ED0D4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.05:1WCAG large text: AA
Contrast with black, large text5.18:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2BEDF1
Analogous#F12B8A, #F1922B
Triadic#2BF12F, #2F2BF1
Split complementary#2BF192, #2B8AF1
Tetradic#8AF12B, #2BEDF1, #922BF1
Tints, shades & saturation
Channel breakdown
R241
G47
B43
Red241 (94.5%)
Green47 (18.4%)
Blue43 (16.9%)
Hue1.21°
Saturation (HSL)87.61%
Lightness55.69%
Dominant channelRed
Hex per channelR F1 · G 2F · B 2B
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Also reads as
F12F2B (chemical formula)
- Formula
- 276.782 g/mol
- 15 atoms
F12F2B has a molar mass of 276.782 g/mol, made up of 15 atoms across 2 elements: 14 × F, 1 × B.
Molar mass
Molar mass276.782 g/mol
Total atoms per molecule15
Distinct elements2
Mass of one molecule4.5960732 × 10^-22 g
Molecules per gram2.1757704 × 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
F96.1%
B3.9%
Fluorine (F × 14)265.972 g/mol, 96.094%
Boron (B)10.81 g/mol, 3.906%
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