Recognised as Colour

#F83155

#F83155
Red
Dark
Nearest: Crimson

#F83155 is a red with RGB values 248, 49, 85 and HSL 349°, 93%, 58%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F83155#F83155

HEX#F83155

RGBrgb(248, 49, 85)

RGB (0–1)0.9725, 0.1922, 0.3333

RGB percentages97.3%, 19.2%, 33.3%

HSLhsl(349.1, 93.4%, 58.2%)

HSV / HSBhsv(349.1, 80.2%, 97.3%)

CMYK0%, 80.2%, 65.7%, 2.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,265,557

CSS custom property--colour: #F83155;

Brightness & contrast

Relative luminance0.22809WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.56:1

Contrast with white3.78:1WCAG normal text: Fail

Contrast with black5.56:1WCAG normal text: AA

Greyscale equivalent#5E5E5E

Inverted#07CEAA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6955no red cones; affects about 1% of men; ΔE 78.1 from the original

Deuteranopia#A0924Fno green cones; the most common form, about 1% of men; ΔE 78.3 from the original

Tritanopia#FF0041no blue cones; rare, and affects men and women equally; ΔE 13 from the original

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

Contrast with white, large text3.78:1WCAG large text: AA

Contrast with black, large text5.56:1WCAG large text: AAA

Named colours

Crimson · ΔE 9.2 Tomato · ΔE 24.2 Firebrick · ΔE 25.1 Brown · ΔE 29.6 Indian red · ΔE 29.8 Salmon · ΔE 31

Nearest named CSS colourCrimson (#DC143C)ΔE 9.22, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#31F8D4

Analogous#F831B8, #F87131

Triadic#55F831, #3155F8

Split complementary#31F871, #31B8F8

Tetradic#B8F831, #31F8D4, #7131F8

Tints, shades & saturation

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

Lighter +40%#FFF6F8

Lighter +30%#FDC5CF

Lighter +20%#FB94A6

Lighter +10%#FA627E

Darker −10%#EE0832

Darker −20%#BD0627

Darker −30%#8B051D

Darker −40%#5A0313

More saturated +25%#FF2A51

Less saturated −25%#DD4C66

Channel breakdown

R248

G49

B85

Red248 (97.3%)

Green49 (19.2%)

Blue85 (33.3%)

Hue349.15°

Saturation (HSL)93.43%

Lightness58.24%

Dominant channelRed

Hex per channelR F8 · G 31 · B 55

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F83155 (chemical formula)

Formula
1,579,778.69 g/mol
83155 atoms

F83155 has a molar mass of 1,579,778.69 g/mol, made up of 83155 atoms across 1 element: 83155 × F.

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Molar mass

Molar mass1,579,778.69 g/mol

Total atoms per molecule83155

Distinct elements1

Mass of one molecule2.6232842 × 10^-18 g

Molecules per gram3.8120154 × 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 × 83155)1,579,778.69 g/mol, 100%

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Elements in this formula

Fluorine

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