Recognised as Colour

#F91B61

#F91B61
Red
Dark
Nearest: Crimson

#F91B61 is a red with RGB values 249, 27, 97 and HSL 341°, 95%, 54%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F91B61#F91B61

HEX#F91B61

RGBrgb(249, 27, 97)

RGB (0–1)0.9765, 0.1059, 0.3804

RGB percentages97.6%, 10.6%, 38%

HSLhsl(341.1, 94.9%, 54.1%)

HSV / HSBhsv(341.1, 89.2%, 97.6%)

CMYK0%, 89.2%, 61%, 2.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,325,473

CSS custom property--colour: #F91B61;

Brightness & contrast

Relative luminance0.21787WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.36:1

Contrast with white3.92:1WCAG normal text: Fail

Contrast with black5.36:1WCAG normal text: AA

Greyscale equivalent#4F4F4F

Inverted#06E49E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#656562no red cones; affects about 1% of men; ΔE 82.5 from the original

Deuteranopia#9C905Bno green cones; the most common form, about 1% of men; ΔE 82.9 from the original

Tritanopia#FF003Eno blue cones; rare, and affects men and women equally; ΔE 20.9 from the original

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

Contrast with white, large text3.92:1WCAG large text: AA

Contrast with black, large text5.36:1WCAG large text: AAA

Named colours

Crimson · ΔE 16.3 Deep pink · ΔE 27.5 Firebrick · ΔE 31.8 Tomato · ΔE 33.9 Indian red · ΔE 34 Brown · ΔE 34.7

Nearest named CSS colourCrimson (#DC143C)ΔE 16.28, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1BF9B3

Analogous#F91BD0, #F9441B

Triadic#61F91B, #1B61F9

Split complementary#1BF944, #1BD0F9

Tetradic#D0F91B, #1BF9B3, #441BF9

Tints, shades & saturation

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

Lighter +40%#FEE2EB

Lighter +30%#FDB0C8

Lighter +20%#FC7EA6

Lighter +10%#FA4D83

Darker −10%#DB0649

Darker −20%#AA0439

Darker −30%#780328

Darker −40%#460217

More saturated +25%#FF155F

Less saturated −25%#DC386C

Channel breakdown

R249

G27

B97

Red249 (97.6%)

Green27 (10.6%)

Blue97 (38%)

Hue341.08°

Saturation (HSL)94.87%

Lightness54.12%

Dominant channelRed

Hex per channelR F9 · G 1B · B 61

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F91B61 (chemical formula)

Formula
2,388.228 g/mol
152 atoms

F91B61 has a molar mass of 2,388.228 g/mol, made up of 152 atoms across 2 elements: 91 × F, 61 × B.

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Molar mass

Molar mass2,388.228 g/mol

Total atoms per molecule152

Distinct elements2

Mass of one molecule3.9657459 × 10^-21 g

Molecules per gram2.5215937 × 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

F72.4%

B27.6%

Fluorine (F × 91)1,728.818 g/mol, 72.389%

Boron (B × 61)659.41 g/mol, 27.611%

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