Recognised as Colour

#FE810B

#FE810B
Orange
Dark
Nearest: Dark orange

#FE810B is a orange with RGB values 254, 129, 11 and HSL 29°, 99%, 52%. It is a dark colour, so black text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark orange.

Colour values

#FE810B#FE810B

HEX#FE810B

RGBrgb(254, 129, 11)

RGB (0–1)0.9961, 0.5059, 0.0431

RGB percentages99.6%, 50.6%, 4.3%

HSLhsl(29.1, 99.2%, 52%)

HSV / HSBhsv(29.1, 95.7%, 99.6%)

CMYK0%, 49.2%, 95.7%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,679,179

CSS custom property--colour: #FE810B;

Brightness & contrast

Relative luminance0.36796WCAG 2.x, 0 is black and 1 is white

Perceived brightness170.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 8.36:1

Contrast with white2.51:1WCAG normal text: Fail

Contrast with black8.36:1WCAG normal text: AAA

Greyscale equivalent#939393

Inverted#017EF4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#A69200no red cones; affects about 1% of men; ΔE 48.2 from the original

Deuteranopia#C4AE03no green cones; the most common form, about 1% of men; ΔE 48.6 from the original

Tritanopia#FF646Fno blue cones; rare, and affects men and women equally; ΔE 50.6 from the original

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

Contrast with white, large text2.51:1WCAG large text: Fail

Contrast with black, large text8.36:1WCAG large text: AAA

Named colours

Dark orange · ΔE 6.5 Chocolate · ΔE 19.9 Orange · ΔE 20.8 Coral · ΔE 25.2 Orange red · ΔE 27.7 Tomato · ΔE 30.8

Nearest named CSS colourDark orange (#FF8C00)ΔE 6.48, clearly different but related

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0B88FE

Analogous#FE0B0F, #FEFB0B

Triadic#0BFE81, #810BFE

Split complementary#0BFEFA, #0B0FFE

Tetradic#0FFE0B, #0B88FE, #FA0BFE

Tints, shades & saturation

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

Lighter +40%#FFEAD6

Lighter +30%#FFD0A3

Lighter +20%#FEB571

Lighter +10%#FE9B3E

Darker −10%#D56801

Darker −20%#A24F01

Darker −30%#703600

Darker −40%#3D1E00

More saturated +25%#FF810A

Less saturated −25%#DF822A

Channel breakdown

R254

G129

B11

Red254 (99.6%)

Green129 (50.6%)

Blue11 (4.3%)

Hue29.14°

Saturation (HSL)99.18%

Lightness51.96%

Dominant channelRed

Hex per channelR FE · G 81 · B 0B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe810B (chemical formula)

Formula
45,245.26 g/mol
811 atoms

Fe810B has a molar mass of 45,245.26 g/mol, made up of 811 atoms across 2 elements: 810 × Fe, 1 × B.

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Molar mass

Molar mass45,245.26 g/mol

Total atoms per molecule811

Distinct elements2

Mass of one molecule7.5131522 × 10^-20 g

Molecules per gram1.3309993 × 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

Fe100%

B0%

Iron (Fe × 810)45,234.45 g/mol, 99.976%

Boron (B)10.81 g/mol, 0.024%

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Elements in this formula

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