Recognised as Colour

#B5701B

#B5701B
Orange
Dark
Nearest: Peru

#B5701B is a orange with RGB values 181, 112, 27 and HSL 33°, 74%, 41%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Peru.

Colour values

#B5701B#B5701B

HEX#B5701B

RGBrgb(181, 112, 27)

RGB (0–1)0.7098, 0.4392, 0.1059

RGB percentages71%, 43.9%, 10.6%

HSLhsl(33.1, 74%, 40.8%)

HSV / HSBhsv(33.1, 85.1%, 71%)

CMYK0%, 38.1%, 85.1%, 29%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,890,715

CSS custom property--colour: #B5701B;

Brightness & contrast

Relative luminance0.21491WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.3:1

Contrast with white3.96:1WCAG normal text: Fail

Contrast with black5.3:1WCAG normal text: AA

Greyscale equivalent#797979

Inverted#4A8FE4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#867606no red cones; affects about 1% of men; ΔE 25.8 from the original

Deuteranopia#96861Dno green cones; the most common form, about 1% of men; ΔE 26.4 from the original

Tritanopia#C66060no blue cones; rare, and affects men and women equally; ΔE 39.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.96:1WCAG large text: AA

Contrast with black, large text5.3:1WCAG large text: AAA

Named colours

Peru · ΔE 10.3 Dark goldenrod · ΔE 15.3 Chocolate · ΔE 16.4 Saddle brown · ΔE 21.4 Sandy brown · ΔE 21.8 Sienna · ΔE 22.4

Nearest named CSS colourPeru (#CD853F)ΔE 10.31, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1B60B5

Analogous#B5231B, #ADB51B

Triadic#1BB570, #701BB5

Split complementary#1BADB5, #231BB5

Tetradic#1BB523, #1B60B5, #B51BAD

Tints, shades & saturation

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

Lighter +40%#F2D2AA

Lighter +30%#ECBA7D

Lighter +20%#E5A351

Lighter +10%#DE8B25

Darker −10%#895514

Darker −20%#5C390E

Darker −30%#301E07

Darker −40%#030201

More saturated +25%#CF7301

Less saturated −25%#9B6D35

Channel breakdown

R181

G112

B27

Red181 (71%)

Green112 (43.9%)

Blue27 (10.6%)

Hue33.12°

Saturation (HSL)74.04%

Lightness40.78%

Dominant channelRed

Hex per channelR B5 · G 70 · B 1B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B5701B (chemical formula)

Formula
61,638.62 g/mol
5702 atoms

B5701B has a molar mass of 61,638.62 g/mol, made up of 5702 atoms across 1 element: 5702 × B.

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Molar mass

Molar mass61,638.62 g/mol

Total atoms per molecule5702

Distinct elements1

Mass of one molecule1.0235334 × 10^-19 g

Molecules per gram9.7700772 × 10^18

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

B100%

Boron (B × 5702)61,638.62 g/mol, 100%

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Elements in this formula

Boron

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