Recognised as Colour

#FF4B2F

#FF4B2F
Red
Dark
Nearest: Tomato

#FF4B2F is a red with RGB values 255, 75, 47 and HSL 8°, 100%, 59%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FF4B2F#FF4B2F

HEX#FF4B2F

RGBrgb(255, 75, 47)

RGB (0–1)1, 0.2941, 0.1843

RGB percentages100%, 29.4%, 18.4%

HSLhsl(8.1, 100%, 59.2%)

HSV / HSBhsv(8.1, 81.6%, 100%)

CMYK0%, 70.6%, 81.6%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,730,927

CSS custom property--colour: #FF4B2F;

Brightness & contrast

Relative luminance0.26497WCAG 2.x, 0 is black and 1 is white

Perceived brightness151.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.3:1

Contrast with white3.33:1WCAG normal text: Fail

Contrast with black6.3:1WCAG normal text: AA

Greyscale equivalent#6F6F6F

Inverted#00B4D0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#817329no red cones; affects about 1% of men; ΔE 72.2 from the original

Deuteranopia#AE9B25no green cones; the most common form, about 1% of men; ΔE 72.2 from the original

Tritanopia#FF0046no blue cones; rare, and affects men and women equally; ΔE 23.4 from the original

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

Contrast with white, large text3.33:1WCAG large text: AA

Contrast with black, large text6.3:1WCAG large text: AAA

Named colours

Tomato · ΔE 12.4 Orange red · ΔE 14.4 Red · ΔE 19.3 Coral · ΔE 23.9 Crimson · ΔE 24.4 Firebrick · ΔE 27.9

Nearest named CSS colourTomato (#FF6347)ΔE 12.45, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2FE3FF

Analogous#FF2F7B, #FFB32F

Triadic#2FFF4B, #4B2FFF

Split complementary#2FFFB3, #2F7BFF

Tetradic#7BFF2F, #2FE3FF, #B32FFF

Tints, shades & saturation

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

Lighter +40%#FFFCFB

Lighter +30%#FFCFC8

Lighter +20%#FFA395

Lighter +10%#FF7762

Darker −10%#FB2200

Darker −20%#C81B00

Darker −30%#951400

Darker −40%#620D00

More saturated +25%#FF4B2F

Less saturated −25%#E55E49

Channel breakdown

R255

G75

B47

Red255 (100%)

Green75 (29.4%)

Blue47 (18.4%)

Hue8.08°

Saturation (HSL)100%

Lightness59.22%

Dominant channelRed

Hex per channelR FF · G 4B · B 2F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF4B2F (chemical formula)

Formula
135.608 g/mol
8 atoms

FF4B2F has a molar mass of 135.608 g/mol, made up of 8 atoms across 2 elements: 6 × F, 2 × B.

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Molar mass

Molar mass135.608 g/mol

Total atoms per molecule8

Distinct elements2

Mass of one molecule2.2518238 × 10^-22 g

Molecules per gram4.4408448 × 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

F84.1%

B15.9%

Fluorine (F × 6)113.988 g/mol, 84.057%

Boron (B × 2)21.62 g/mol, 15.943%

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Elements in this formula

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