Recognised as Colour

#F15B20

#F15B20
Orange
Dark
Nearest: Tomato

#F15B20 is a orange with RGB values 241, 91, 32 and HSL 17°, 88%, 54%. 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

#F15B20#F15B20

HEX#F15B20

RGBrgb(241, 91, 32)

RGB (0–1)0.9451, 0.3569, 0.1255

RGB percentages94.5%, 35.7%, 12.5%

HSLhsl(16.9, 88.2%, 53.5%)

HSV / HSBhsv(16.9, 86.7%, 94.5%)

CMYK0%, 62.2%, 86.7%, 5.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,817,504

CSS custom property--colour: #F15B20;

Brightness & contrast

Relative luminance0.26287WCAG 2.x, 0 is black and 1 is white

Perceived brightness149.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.26:1

Contrast with white3.36:1WCAG normal text: Fail

Contrast with black6.26:1WCAG normal text: AA

Greyscale equivalent#777777

Inverted#0EA4DF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#877713no red cones; affects about 1% of men; ΔE 60.7 from the original

Deuteranopia#AB9916no green cones; the most common form, about 1% of men; ΔE 61.7 from the original

Tritanopia#FF3150no blue cones; rare, and affects men and women equally; ΔE 32.5 from the original

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

Contrast with white, large text3.36:1WCAG large text: AA

Contrast with black, large text6.26:1WCAG large text: AAA

Named colours

Tomato · ΔE 14.3 Orange red · ΔE 15.5 Coral · ΔE 18.2 Chocolate · ΔE 18.6 Red · ΔE 26.4 Dark orange · ΔE 26.6

Nearest named CSS colourTomato (#FF6347)ΔE 14.28, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#20B6F1

Analogous#F1204E, #F1C420

Triadic#20F15B, #5B20F1

Split complementary#20F1C4, #204DF1

Tetradic#4DF120, #20B6F1, #C420F1

Tints, shades & saturation

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

Lighter +40%#FDE8E0

Lighter +30%#FAC5B0

Lighter +20%#F7A280

Lighter +10%#F47E50

Darker −10%#D1440D

Darker −20%#A1350A

Darker −30%#712507

Darker −40%#411504

More saturated +25%#FF5512

Less saturated −25%#D3683E

Channel breakdown

R241

G91

B32

Red241 (94.5%)

Green91 (35.7%)

Blue32 (12.5%)

Hue16.94°

Saturation (HSL)88.19%

Lightness53.53%

Dominant channelRed

Hex per channelR F1 · G 5B · B 20

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F15B20 (chemical formula)

Formula
501.17 g/mol
35 atoms

F15B20 has a molar mass of 501.17 g/mol, made up of 35 atoms across 2 elements: 15 × F, 20 × B.

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Molar mass

Molar mass501.17 g/mol

Total atoms per molecule35

Distinct elements2

Mass of one molecule8.3221236 × 10^-22 g

Molecules per gram1.2016164 × 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

F56.9%

B43.1%

Fluorine (F × 15)284.97 g/mol, 56.861%

Boron (B × 20)216.2 g/mol, 43.139%

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