Recognised as Colour
#F54837
- #F54837
- Red
- Dark
- Nearest: Tomato
#F54837 is a red with RGB values 245, 72, 55 and HSL 5°, 90%, 59%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#F54837#F54837
HEX#F54837
RGBrgb(245, 72, 55)
RGB (0–1)0.9608, 0.2824, 0.2157
RGB percentages96.1%, 28.2%, 21.6%
HSLhsl(5.4, 90.5%, 58.8%)
HSV / HSBhsv(5.4, 77.6%, 96.1%)
CMYK0%, 70.6%, 77.6%, 3.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,074,807
CSS custom property--colour: #F54837;
Brightness & contrast
Relative luminance0.24323WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.86:1
Contrast with white3.58:1WCAG normal text: Fail
Contrast with black5.86:1WCAG normal text: AA
Greyscale equivalent#6C6C6C
Inverted#0AB7C8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.58:1WCAG large text: AA
Contrast with black, large text5.86:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#37E4F5
Analogous#F53785, #F5A737
Triadic#37F548, #4837F5
Split complementary#37F5A7, #3785F5
Tetradic#85F537, #37E4F5, #A737F5
Tints, shades & saturation
Channel breakdown
R245
G72
B55
Red245 (96.1%)
Green72 (28.2%)
Blue55 (21.6%)
Hue5.37°
Saturation (HSL)90.48%
Lightness58.82%
Dominant channelRed
Hex per channelR F5 · G 48 · B 37
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Also reads as
F54837 (chemical formula)
- Formula
- 1,041,793.326 g/mol
- 54837 atoms
F54837 has a molar mass of 1,041,793.326 g/mol, made up of 54837 atoms across 1 element: 54837 × F.
Molar mass
Molar mass1,041,793.326 g/mol
Total atoms per molecule54837
Distinct elements1
Mass of one molecule1.7299385 × 10^-18 g
Molecules per gram5.7805523 × 10^17
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 × 54837)1,041,793.326 g/mol, 100%
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