Recognised as Colour

#FF2142

#FF2142
Red
Dark
Nearest: Crimson

#FF2142 is a red with RGB values 255, 33, 66 and HSL 351°, 100%, 56%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF2142#FF2142

HEX#FF2142

RGBrgb(255, 33, 66)

RGB (0–1)1, 0.1294, 0.2588

RGB percentages100%, 12.9%, 25.9%

HSLhsl(351.1, 100%, 56.5%)

HSV / HSBhsv(351.1, 87.1%, 100%)

CMYK0%, 87.1%, 74.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,720,194

CSS custom property--colour: #FF2142;

Brightness & contrast

Relative luminance0.22741WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.55:1

Contrast with white3.79:1WCAG normal text: Fail

Contrast with black5.55:1WCAG normal text: AA

Greyscale equivalent#535353

Inverted#00DEBD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6641no red cones; affects about 1% of men; ΔE 83.7 from the original

Deuteranopia#A3933Ano green cones; the most common form, about 1% of men; ΔE 83.4 from the original

Tritanopia#FF0032no blue cones; rare, and affects men and women equally; ΔE 8.1 from the original

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

Contrast with white, large text3.79:1WCAG large text: AA

Contrast with black, large text5.55:1WCAG large text: AAA

Named colours

Crimson · ΔE 12.7 Tomato · ΔE 22.1 Red · ΔE 26.5 Firebrick · ΔE 27.2 Orange red · ΔE 30 Brown · ΔE 34.7

Nearest named CSS colourCrimson (#DC143C)ΔE 12.75, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21FFDE

Analogous#FF21B1, #FF6F21

Triadic#42FF21, #2142FF

Split complementary#21FF6F, #21B1FF

Tetradic#B1FF21, #21FFDE, #6F21FF

Tints, shades & saturation

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

Lighter +40%#FFEDF0

Lighter +30%#FFBAC4

Lighter +20%#FF8799

Lighter +10%#FF546D

Darker −10%#ED0023

Darker −20%#BA001C

Darker −30%#870014

Darker −40%#54000C

More saturated +25%#FF2142

Less saturated −25%#E33D56

Channel breakdown

R255

G33

B66

Red255 (100%)

Green33 (12.9%)

Blue66 (25.9%)

Hue351.08°

Saturation (HSL)100%

Lightness56.47%

Dominant channelRed

Hex per channelR FF · G 21 · B 42

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2142 (chemical formula)

Formula
40,712.714 g/mol
2143 atoms

FF2142 has a molar mass of 40,712.714 g/mol, made up of 2143 atoms across 1 element: 2143 × F.

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Molar mass

Molar mass40,712.714 g/mol

Total atoms per molecule2143

Distinct elements1

Mass of one molecule6.7605052 × 10^-20 g

Molecules per gram1.4791794 × 10^19

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 × 2143)40,712.714 g/mol, 100%

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Elements in this formula

Fluorine

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