Recognised as Colour

#F91F47

#F91F47
Red
Dark
Nearest: Crimson

#F91F47 is a red with RGB values 249, 31, 71 and HSL 349°, 95%, 55%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F91F47#F91F47

HEX#F91F47

RGBrgb(249, 31, 71)

RGB (0–1)0.9765, 0.1216, 0.2784

RGB percentages97.6%, 12.2%, 27.8%

HSLhsl(349, 94.8%, 54.9%)

HSV / HSBhsv(349, 87.6%, 97.6%)

CMYK0%, 87.6%, 71.5%, 2.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,326,471

CSS custom property--colour: #F91F47;

Brightness & contrast

Relative luminance0.21575WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.31:1

Contrast with white3.95:1WCAG normal text: Fail

Contrast with black5.31:1WCAG normal text: AA

Greyscale equivalent#505050

Inverted#06E0B8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6B6346no red cones; affects about 1% of men; ΔE 81.7 from the original

Deuteranopia#9F903Fno green cones; the most common form, about 1% of men; ΔE 82.3 from the original

Tritanopia#FF0033no blue cones; rare, and affects men and women equally; ΔE 12.2 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text3.95:1WCAG large text: AA

Contrast with black, large text5.31:1WCAG large text: AAA

Named colours

Crimson · ΔE 9.3 Tomato · ΔE 23.3 Firebrick · ΔE 25.6 Red · ΔE 31.1 Brown · ΔE 32.1 Orange red · ΔE 34.2

Nearest named CSS colourCrimson (#DC143C)ΔE 9.29, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#1FF9D1

Analogous#F91FB4, #F9641F

Triadic#47F91F, #1F47F9

Split complementary#1FF964, #1FB4F9

Tetradic#B4F91F, #1FF9D1, #641FF9

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FEE6EA

Lighter +30%#FDB4C1

Lighter +20%#FC8299

Lighter +10%#FA5170

Darker −10%#DF062E

Darker −20%#AD0524

Darker −30%#7C0319

Darker −40%#4A020F

More saturated +25%#FF1943

Less saturated −25%#DC3C59

Channel breakdown

R249

G31

B71

Red249 (97.6%)

Green31 (12.2%)

Blue71 (27.8%)

Hue348.99°

Saturation (HSL)94.78%

Lightness54.9%

Dominant channelRed

Hex per channelR F9 · G 1F · B 47

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F91F47 (chemical formula)

Formula
2,621.724 g/mol
138 atoms

F91F47 has a molar mass of 2,621.724 g/mol, made up of 138 atoms across 1 element: 138 × F.

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Molar mass

Molar mass2,621.724 g/mol

Total atoms per molecule138

Distinct elements1

Mass of one molecule4.3534751 × 10^-21 g

Molecules per gram2.2970155 × 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 × 138)2,621.724 g/mol, 100%

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Elements in this formula

Fluorine

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