Recognised as Colour

#B13800

#B13800
Orange
Dark
Nearest: Firebrick

#B13800 is a orange with RGB values 177, 56, 0 and HSL 19°, 100%, 35%. It is a dark colour, so white text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B13800#B13800

HEX#B13800

RGBrgb(177, 56, 0)

RGB (0–1)0.6941, 0.2196, 0

RGB percentages69.4%, 22%, 0%

HSLhsl(19, 100%, 34.7%)

HSV / HSBhsv(19, 100%, 69.4%)

CMYK0%, 68.4%, 100%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,614,208

CSS custom property--colour: #B13800;

Brightness & contrast

Relative luminance0.12175WCAG 2.x, 0 is black and 1 is white

Perceived brightness105.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.11:1

Contrast with white6.11:1WCAG normal text: AA

Contrast with black3.44:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#4EC7FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5D5100no red cones; affects about 1% of men; ΔE 52.2 from the original

Deuteranopia#7A6C00no green cones; the most common form, about 1% of men; ΔE 52.2 from the original

Tritanopia#C40830no blue cones; rare, and affects men and women equally; ΔE 27.4 from the original

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

Contrast with white, large text6.11:1WCAG large text: AAA

Contrast with black, large text3.44:1WCAG large text: AA

Named colours

Firebrick · ΔE 17.9 Chocolate · ΔE 18.1 Dark red · ΔE 18.3 Maroon · ΔE 22 Brown · ΔE 23.1 Tomato · ΔE 24.2

Nearest named CSS colourFirebrick (#B22222)ΔE 17.92, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0079B1

Analogous#B10021, #B19100

Triadic#00B138, #3800B1

Split complementary#00B191, #0020B1

Tetradic#20B100, #0079B1, #9100B1

Tints, shades & saturation

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

Lighter +40%#FFA77E

Lighter +30%#FF844B

Lighter +20%#FF6118

Lighter +10%#E44800

Darker −10%#7E2800

Darker −20%#4B1800

Darker −30%#180800

Darker −40%#000000

More saturated +25%#B13800

Less saturated −25%#9B4016

Channel breakdown

R177

G56

Red177 (69.4%)

Green56 (22%)

Blue0 (0%)

Hue18.98°

Saturation (HSL)100%

Lightness34.71%

Dominant channelRed

Hex per channelR B1 · G 38 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B13800 (chemical formula)

Formula
149,178 g/mol
13800 atoms

B13800 has a molar mass of 149,178 g/mol, made up of 13800 atoms across 1 element: 13800 × B.

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Molar mass

Molar mass149,178 g/mol

Total atoms per molecule13800

Distinct elements1

Mass of one molecule2.477159 × 10^-19 g

Molecules per gram4.0368826 × 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 × 13800)149,178 g/mol, 100%

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Elements in this formula

Boron

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