Recognised as Colour

#FF2B42

#FF2B42
Red
Dark
Nearest: Crimson

#FF2B42 is a red with RGB values 255, 43, 66 and HSL 353°, 100%, 58%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF2B42#FF2B42

HEX#FF2B42

RGBrgb(255, 43, 66)

RGB (0–1)1, 0.1686, 0.2588

RGB percentages100%, 16.9%, 25.9%

HSLhsl(353.5, 100%, 58.4%)

HSV / HSBhsv(353.5, 83.1%, 100%)

CMYK0%, 83.1%, 74.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,722,754

CSS custom property--colour: #FF2B42;

Brightness & contrast

Relative luminance0.23381WCAG 2.x, 0 is black and 1 is white

Perceived brightness145 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.68:1

Contrast with white3.7:1WCAG normal text: Fail

Contrast with black5.68:1WCAG normal text: AA

Greyscale equivalent#5A5A5A

Inverted#00D4BD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#716841no red cones; affects about 1% of men; ΔE 81.6 from the original

Deuteranopia#A5953Ano green cones; the most common form, about 1% of men; ΔE 81.8 from the original

Tritanopia#FF0037no blue cones; rare, and affects men and women equally; ΔE 6.6 from the original

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

Contrast with white, large text3.7:1WCAG large text: AA

Contrast with black, large text5.68:1WCAG large text: AAA

Named colours

Crimson · ΔE 12.7 Tomato · ΔE 20 Red · ΔE 26 Firebrick · ΔE 26.2 Orange red · ΔE 28.6 Coral · ΔE 33.4

Nearest named CSS colourCrimson (#DC143C)ΔE 12.71, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BFFE8

Analogous#FF2BAC, #FF7E2B

Triadic#42FF2B, #2B42FF

Split complementary#2BFF7E, #2BACFF

Tetradic#ACFF2B, #2BFFE8, #7E2BFF

Tints, shades & saturation

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

Lighter +40%#FFF7F8

Lighter +30%#FFC4CA

Lighter +20%#FF919D

Lighter +10%#FF5E6F

Darker −10%#F7001B

Darker −20%#C40015

Darker −30%#910010

Darker −40%#5E000A

More saturated +25%#FF2B42

Less saturated −25%#E54657

Channel breakdown

R255

G43

B66

Red255 (100%)

Green43 (16.9%)

Blue66 (25.9%)

Hue353.49°

Saturation (HSL)100%

Lightness58.43%

Dominant channelRed

Hex per channelR FF · G 2B · B 42

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2B42 (chemical formula)

Formula
511.014 g/mol
45 atoms

FF2B42 has a molar mass of 511.014 g/mol, made up of 45 atoms across 2 elements: 3 × F, 42 × B.

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Molar mass

Molar mass511.014 g/mol

Total atoms per molecule45

Distinct elements2

Mass of one molecule8.4855871 × 10^-22 g

Molecules per gram1.1784688 × 10^21

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

F11.2%

B88.8%

Fluorine (F × 3)56.994 g/mol, 11.153%

Boron (B × 42)454.02 g/mol, 88.847%

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