Recognised as Colour

#F41537

#F41537
Red
Dark
Nearest: Crimson

#F41537 is a red with RGB values 244, 21, 55 and HSL 351°, 91%, 52%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F41537#F41537

HEX#F41537

RGBrgb(244, 21, 55)

RGB (0–1)0.9569, 0.0824, 0.2157

RGB percentages95.7%, 8.2%, 21.6%

HSLhsl(350.9, 91%, 52%)

HSV / HSBhsv(350.9, 91.4%, 95.7%)

CMYK0%, 91.4%, 77.5%, 4.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,996,215

CSS custom property--colour: #F41537;

Brightness & contrast

Relative luminance0.20045WCAG 2.x, 0 is black and 1 is white

Perceived brightness135.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.01:1

Contrast with white4.19:1WCAG normal text: Fail

Contrast with black5.01:1WCAG normal text: AA

Greyscale equivalent#474747

Inverted#0BEAC8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#685F36no red cones; affects about 1% of men; ΔE 82.3 from the original

Deuteranopia#9B8C2Dno green cones; the most common form, about 1% of men; ΔE 82.6 from the original

Tritanopia#FF0028no blue cones; rare, and affects men and women equally; ΔE 11 from the original

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

Contrast with white, large text4.19:1WCAG large text: AA

Contrast with black, large text5.01:1WCAG large text: AAA

Named colours

Crimson · ΔE 12.2 Tomato · ΔE 21.6 Red · ΔE 24.2 Firebrick · ΔE 24.9 Orange red · ΔE 27.7 Brown · ΔE 33

Nearest named CSS colourCrimson (#DC143C)ΔE 12.2, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15F4D2

Analogous#F415A7, #F46315

Triadic#37F415, #1537F4

Split complementary#15F463, #15A7F4

Tetradic#A7F415, #15F4D2, #6215F4

Tints, shades & saturation

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

Lighter +40%#FDD8DE

Lighter +30%#FBA7B4

Lighter +20%#F9768A

Lighter +10%#F64661

Darker −10%#CC0A27

Darker −20%#9C071E

Darker −30%#6B0515

Darker −40%#3A030B

More saturated +25%#FF0A2F

Less saturated −25%#D5344C

Channel breakdown

R244

G21

B55

Red244 (95.7%)

Green21 (8.2%)

Blue55 (21.6%)

Hue350.85°

Saturation (HSL)91.02%

Lightness51.96%

Dominant channelRed

Hex per channelR F4 · G 15 · B 37

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F41537 (chemical formula)

Formula
789,119.926 g/mol
41537 atoms

F41537 has a molar mass of 789,119.926 g/mol, made up of 41537 atoms across 1 element: 41537 × F.

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Molar mass

Molar mass789,119.926 g/mol

Total atoms per molecule41537

Distinct elements1

Mass of one molecule1.3103645 × 10^-18 g

Molecules per gram7.6314646 × 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 × 41537)789,119.926 g/mol, 100%

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Elements in this formula

Fluorine

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