Recognised as Colour
#F42F19
- #F42F19
- Red
- Dark
- Nearest: Orange red
#F42F19 is a red with RGB values 244, 47, 25 and HSL 6°, 91%, 53%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#F42F19#F42F19
HEX#F42F19
RGBrgb(244, 47, 25)
RGB (0–1)0.9569, 0.1843, 0.098
RGB percentages95.7%, 18.4%, 9.8%
HSLhsl(6, 90.9%, 52.7%)
HSV / HSBhsv(6, 89.8%, 95.7%)
CMYK0%, 80.7%, 89.8%, 4.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,002,841
CSS custom property--colour: #F42F19;
Brightness & contrast
Relative luminance0.21336WCAG 2.x, 0 is black and 1 is white
Perceived brightness138.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.27:1
Contrast with white3.99:1WCAG normal text: Fail
Contrast with black5.27:1WCAG normal text: AA
Greyscale equivalent#575757
Inverted#0BD0E6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.99:1WCAG large text: AA
Contrast with black, large text5.27:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#19DEF4
Analogous#F41970, #F49D19
Triadic#19F42F, #2F19F4
Split complementary#19F49D, #1970F4
Tetradic#71F419, #19DEF4, #9D19F4
Tints, shades & saturation
Channel breakdown
R244
G47
B25
Red244 (95.7%)
Green47 (18.4%)
Blue25 (9.8%)
Hue6.03°
Saturation (HSL)90.87%
Lightness52.75%
Dominant channelRed
Hex per channelR F4 · G 2F · B 19
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Also reads as
F42F19 (chemical formula)
- Formula
- 1,158.878 g/mol
- 61 atoms
F42F19 has a molar mass of 1,158.878 g/mol, made up of 61 atoms across 1 element: 61 × F.
Molar mass
Molar mass1,158.878 g/mol
Total atoms per molecule61
Distinct elements1
Mass of one molecule1.9243622 × 10^-21 g
Molecules per gram5.196527 × 10^20
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 × 61)1,158.878 g/mol, 100%
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