Recognised as Colour
#F71951
- #F71951
- Red
- Dark
- Nearest: Crimson
#F71951 is a red with RGB values 247, 25, 81 and HSL 345°, 93%, 53%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#F71951#F71951
HEX#F71951
RGBrgb(247, 25, 81)
RGB (0–1)0.9686, 0.098, 0.3176
RGB percentages96.9%, 9.8%, 31.8%
HSLhsl(344.9, 93.3%, 53.3%)
HSV / HSBhsv(344.9, 89.9%, 96.9%)
CMYK0%, 89.9%, 67.2%, 3.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,193,873
CSS custom property--colour: #F71951;
Brightness & contrast
Relative luminance0.21063WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.21:1
Contrast with white4.03:1WCAG normal text: Fail
Contrast with black5.21:1WCAG normal text: AA
Greyscale equivalent#4C4C4C
Inverted#08E6AE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.03:1WCAG large text: AA
Contrast with black, large text5.21:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#19F7BF
Analogous#F719C0, #F75019
Triadic#51F719, #1951F7
Split complementary#19F750, #19C0F7
Tetradic#C0F719, #19F7BF, #5019F7
Tints, shades & saturation
Channel breakdown
R247
G25
B81
Red247 (96.9%)
Green25 (9.8%)
Blue81 (31.8%)
Hue344.86°
Saturation (HSL)93.28%
Lightness53.33%
Dominant channelRed
Hex per channelR F7 · G 19 · B 51
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Also reads as
F71951 (chemical formula)
- Formula
- 1,366,925.098 g/mol
- 71951 atoms
F71951 has a molar mass of 1,366,925.098 g/mol, made up of 71951 atoms across 1 element: 71951 × F.
Molar mass
Molar mass1,366,925.098 g/mol
Total atoms per molecule71951
Distinct elements1
Mass of one molecule2.2698325 × 10^-18 g
Molecules per gram4.4056114 × 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 × 71951)1,366,925.098 g/mol, 100%
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