Recognised as Colour

#F10331

#F10331
Red
Dark
Nearest: Crimson

#F10331 is a red with RGB values 241, 3, 49 and HSL 348°, 98%, 48%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F10331#F10331

HEX#F10331

RGBrgb(241, 3, 49)

RGB (0–1)0.9451, 0.0118, 0.1922

RGB percentages94.5%, 1.2%, 19.2%

HSLhsl(348.4, 97.5%, 47.8%)

HSV / HSBhsv(348.4, 98.8%, 94.5%)

CMYK0%, 98.8%, 79.7%, 5.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,794,993

CSS custom property--colour: #F10331;

Brightness & contrast

Relative luminance0.18988WCAG 2.x, 0 is black and 1 is white

Perceived brightness132.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.8:1

Contrast with white4.38:1WCAG normal text: Fail

Contrast with black4.8:1WCAG normal text: AA

Greyscale equivalent#393939

Inverted#0EFCCE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#645B2Fno red cones; affects about 1% of men; ΔE 83.3 from the original

Deuteranopia#998926no green cones; the most common form, about 1% of men; ΔE 82.9 from the original

Tritanopia#FF0020no blue cones; rare, and affects men and women equally; ΔE 12.7 from the original

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

Contrast with white, large text4.38:1WCAG large text: AA

Contrast with black, large text4.8:1WCAG large text: AAA

Named colours

Crimson · ΔE 13.7 Red · ΔE 22.4 Tomato · ΔE 22.6 Firebrick · ΔE 25.4 Orange red · ΔE 26.5 Brown · ΔE 33.8

Nearest named CSS colourCrimson (#DC143C)ΔE 13.66, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03F1C3

Analogous#F103A8, #F14C03

Triadic#31F103, #0331F1

Split complementary#03F14C, #03A8F1

Tetradic#A8F103, #03F1C3, #4C03F1

Tints, shades & saturation

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

Lighter +40%#FEC2CD

Lighter +30%#FE8FA5

Lighter +20%#FD5D7C

Lighter +10%#FC2B53

Darker −10%#BF0227

Darker −20%#8C021D

Darker −30%#5A0112

Darker −40%#280008

More saturated +25%#F4002F

Less saturated −25%#D32144

Channel breakdown

R241

B49

Red241 (94.5%)

Green3 (1.2%)

Blue49 (19.2%)

Hue348.4°

Saturation (HSL)97.54%

Lightness47.84%

Dominant channelRed

Hex per channelR F1 · G 03 · B 31

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F10331 (chemical formula)

Formula
196,268.338 g/mol
10331 atoms

F10331 has a molar mass of 196,268.338 g/mol, made up of 10331 atoms across 1 element: 10331 × F.

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Molar mass

Molar mass196,268.338 g/mol

Total atoms per molecule10331

Distinct elements1

Mass of one molecule3.2591124 × 10^-19 g

Molecules per gram3.06832 × 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 × 10331)196,268.338 g/mol, 100%

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Elements in this formula

Fluorine

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