Recognised as Colour
#F21429
- #F21429
- Red
- Dark
- Nearest: Crimson
#F21429 is a red with RGB values 242, 20, 41 and HSL 354°, 90%, 51%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#F21429#F21429
HEX#F21429
RGBrgb(242, 20, 41)
RGB (0–1)0.949, 0.0784, 0.1608
RGB percentages94.9%, 7.8%, 16.1%
HSLhsl(354.3, 89.5%, 51.4%)
HSV / HSBhsv(354.3, 91.7%, 94.9%)
CMYK0%, 91.7%, 83.1%, 5.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,864,873
CSS custom property--colour: #F21429;
Brightness & contrast
Relative luminance0.19538WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.28:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#454545
Inverted#0DEBD6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.28:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#14F2DD
Analogous#F21498, #F26E14
Triadic#29F214, #1429F2
Split complementary#14F26E, #1498F2
Tetradic#98F214, #14F2DD, #6E14F2
Tints, shades & saturation
Channel breakdown
R242
G20
B41
Red242 (94.9%)
Green20 (7.8%)
Blue41 (16.1%)
Hue354.32°
Saturation (HSL)89.52%
Lightness51.37%
Dominant channelRed
Hex per channelR F2 · G 14 · B 29
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Also reads as
F21429 (chemical formula)
- Formula
- 407,108.142 g/mol
- 21429 atoms
F21429 has a molar mass of 407,108.142 g/mol, made up of 21429 atoms across 1 element: 21429 × F.
Molar mass
Molar mass407,108.142 g/mol
Total atoms per molecule21429
Distinct elements1
Mass of one molecule6.7601897 × 10^-19 g
Molecules per gram1.4792484 × 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 × 21429)407,108.142 g/mol, 100%
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