Recognised as Colour

#F33F32

#F33F32
Red
Dark
Nearest: Tomato

#F33F32 is a red with RGB values 243, 63, 50 and HSL 4°, 89%, 57%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#F33F32#F33F32

HEX#F33F32

RGBrgb(243, 63, 50)

RGB (0–1)0.9529, 0.2471, 0.1961

RGB percentages95.3%, 24.7%, 19.6%

HSLhsl(4, 88.9%, 57.5%)

HSV / HSBhsv(4, 79.4%, 95.3%)

CMYK0%, 74.1%, 79.4%, 4.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,941,426

CSS custom property--colour: #F33F32;

Brightness & contrast

Relative luminance0.2284WCAG 2.x, 0 is black and 1 is white

Perceived brightness142.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.57:1

Contrast with white3.77:1WCAG normal text: Fail

Contrast with black5.57:1WCAG normal text: AA

Greyscale equivalent#646464

Inverted#0CC0CD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#766A2Eno red cones; affects about 1% of men; ΔE 72.5 from the original

Deuteranopia#A39229no green cones; the most common form, about 1% of men; ΔE 72.7 from the original

Tritanopia#FF003Eno blue cones; rare, and affects men and women equally; ΔE 16 from the original

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

Contrast with white, large text3.77:1WCAG large text: AA

Contrast with black, large text5.57:1WCAG large text: AAA

Named colours

Tomato · ΔE 11.9 Crimson · ΔE 17.7 Orange red · ΔE 20.2 Firebrick · ΔE 22.3 Red · ΔE 22.6 Coral · ΔE 24.9

Nearest named CSS colourTomato (#FF6347)ΔE 11.9, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#32E6F3

Analogous#F33286, #F39F32

Triadic#32F33F, #3F32F3

Split complementary#32F39F, #3286F3

Tetradic#86F332, #32E6F3, #9F32F3

Tints, shades & saturation

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

Lighter +40%#FEF3F3

Lighter +30%#FBC6C3

Lighter +20%#F99992

Lighter +10%#F66C62

Darker −10%#E51C0D

Darker −20%#B4160B

Darker −30%#841008

Darker −40%#540A05

More saturated +25%#FF3526

Less saturated −25%#D8564D

Channel breakdown

R243

G63

B50

Red243 (95.3%)

Green63 (24.7%)

Blue50 (19.6%)

Hue4.04°

Saturation (HSL)88.94%

Lightness57.45%

Dominant channelRed

Hex per channelR F3 · G 3F · B 32

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F33F32 (chemical formula)

Formula
1,234.87 g/mol
65 atoms

F33F32 has a molar mass of 1,234.87 g/mol, made up of 65 atoms across 1 element: 65 × F.

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Molar mass

Molar mass1,234.87 g/mol

Total atoms per molecule65

Distinct elements1

Mass of one molecule2.0505499 × 10^-21 g

Molecules per gram4.8767407 × 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

F100%

Fluorine (F × 65)1,234.87 g/mol, 100%

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Elements in this formula

Fluorine

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