Recognised as Colour

#B45121

#B45121
Orange
Dark
Nearest: Sienna

#B45121 is a orange with RGB values 180, 81, 33 and HSL 20°, 69%, 42%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#B45121#B45121

HEX#B45121

RGBrgb(180, 81, 33)

RGB (0–1)0.7059, 0.3176, 0.1294

RGB percentages70.6%, 31.8%, 12.9%

HSLhsl(19.6, 69%, 41.8%)

HSV / HSBhsv(19.6, 81.7%, 70.6%)

CMYK0%, 55%, 81.7%, 29.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,817,249

CSS custom property--colour: #B45121;

Brightness & contrast

Relative luminance0.15698WCAG 2.x, 0 is black and 1 is white

Perceived brightness116.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.07:1

Contrast with white5.07:1WCAG normal text: AA

Contrast with black4.14:1WCAG normal text: Fail

Greyscale equivalent#636363

Inverted#4BAEDE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D611Ano red cones; affects about 1% of men; ΔE 42 from the original

Deuteranopia#85771Eno green cones; the most common form, about 1% of men; ΔE 42.4 from the original

Tritanopia#C63B47no blue cones; rare, and affects men and women equally; ΔE 27 from the original

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

Contrast with white, large text5.07:1WCAG large text: AAA

Contrast with black, large text4.14:1WCAG large text: AA

Named colours

Sienna · ΔE 13.1 Chocolate · ΔE 14.7 Saddle brown · ΔE 15 Brown · ΔE 21.3 Firebrick · ΔE 21.4 Peru · ΔE 22.2

Nearest named CSS colourSienna (#A0522D)ΔE 13.07, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2184B4

Analogous#B4213B, #B49A21

Triadic#21B451, #5121B4

Split complementary#21B49A, #213BB4

Tetradic#3BB421, #2184B4, #9A21B4

Tints, shades & saturation

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

Lighter +40%#F1C5B0

Lighter +30%#E9A685

Lighter +20%#E1865A

Lighter +10%#D9672F

Darker −10%#893E19

Darker −20%#5E2A11

Darker −30%#331709

Darker −40%#080301

More saturated +25%#CF4806

Less saturated −25%#995A3C

Channel breakdown

R180

G81

B33

Red180 (70.6%)

Green81 (31.8%)

Blue33 (12.9%)

Hue19.59°

Saturation (HSL)69.01%

Lightness41.76%

Dominant channelRed

Hex per channelR B4 · G 51 · B 21

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B45121 (chemical formula)

Formula
487,758.01 g/mol
45121 atoms

B45121 has a molar mass of 487,758.01 g/mol, made up of 45121 atoms across 1 element: 45121 × B.

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Molar mass

Molar mass487,758.01 g/mol

Total atoms per molecule45121

Distinct elements1

Mass of one molecule8.0994123 × 10^-19 g

Molecules per gram1.2346575 × 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 × 45121)487,758.01 g/mol, 100%

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Elements in this formula

Boron

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