Recognised as Colour

#FF153C

#FF153C
Red
Dark
Nearest: Crimson

#FF153C is a red with RGB values 255, 21, 60 and HSL 350°, 100%, 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

#FF153C#FF153C

HEX#FF153C

RGBrgb(255, 21, 60)

RGB (0–1)1, 0.0824, 0.2353

RGB percentages100%, 8.2%, 23.5%

HSLhsl(350, 100%, 54.1%)

HSV / HSBhsv(350, 91.8%, 100%)

CMYK0%, 91.8%, 76.5%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,116

CSS custom property--colour: #FF153C;

Brightness & contrast

Relative luminance0.22123WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.42:1

Contrast with white3.87:1WCAG normal text: Fail

Contrast with black5.42:1WCAG normal text: AA

Greyscale equivalent#4A4A4A

Inverted#00EAC3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C633Bno red cones; affects about 1% of men; ΔE 85.3 from the original

Deuteranopia#A29232no green cones; the most common form, about 1% of men; ΔE 85.3 from the original

Tritanopia#FF002Ano blue cones; rare, and affects men and women equally; ΔE 9 from the original

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

Contrast with white, large text3.87:1WCAG large text: AA

Contrast with black, large text5.42:1WCAG large text: AAA

Named colours

Crimson · ΔE 14.9 Tomato · ΔE 23.2 Red · ΔE 23.7 Orange red · ΔE 28.1 Firebrick · ΔE 28.5 Brown · ΔE 36.4

Nearest named CSS colourCrimson (#DC143C)ΔE 14.89, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15FFD8

Analogous#FF15B1, #FF6315

Triadic#3CFF15, #153CFF

Split complementary#15FF63, #15B1FF

Tetradic#B1FF15, #15FFD8, #6315FF

Tints, shades & saturation

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

Lighter +40%#FFE1E6

Lighter +30%#FFAEBC

Lighter +20%#FF7B91

Lighter +10%#FF4867

Darker −10%#E10026

Darker −20%#AE001D

Darker −30%#7B0015

Darker −40%#48000C

More saturated +25%#FF153C

Less saturated −25%#E23250

Channel breakdown

R255

G21

B60

Red255 (100%)

Green21 (8.2%)

Blue60 (23.5%)

Hue350°

Saturation (HSL)100%

Lightness54.12%

Dominant channelRed

Hex per channelR FF · G 15 · B 3C

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF153C (chemical formula)

Formula
2,937.703 g/mol
155 atoms

FF153C has a molar mass of 2,937.703 g/mol, made up of 155 atoms across 2 elements: 154 × F, 1 × C.

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Molar mass

Molar mass2,937.703 g/mol

Total atoms per molecule155

Distinct elements2

Mass of one molecule4.8781706 × 10^-21 g

Molecules per gram2.0499488 × 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

F99.6%

C0.4%

Fluorine (F × 154)2,925.692 g/mol, 99.591%

Carbon (C)12.011 g/mol, 0.409%

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