Recognised as Colour

#B41508

#B41508
Red
Dark
Nearest: Firebrick

#B41508 is a red with RGB values 180, 21, 8 and HSL 5°, 91%, 37%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B41508#B41508

HEX#B41508

RGBrgb(180, 21, 8)

RGB (0–1)0.7059, 0.0824, 0.0314

RGB percentages70.6%, 8.2%, 3.1%

HSLhsl(4.5, 91.5%, 36.9%)

HSV / HSBhsv(4.5, 95.6%, 70.6%)

CMYK0%, 88.3%, 95.6%, 29.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,801,864

CSS custom property--colour: #B41508;

Brightness & contrast

Relative luminance0.10257WCAG 2.x, 0 is black and 1 is white

Perceived brightness99.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.88:1

Contrast with white6.88:1WCAG normal text: AA

Contrast with black3.05:1WCAG normal text: Fail

Greyscale equivalent#363636

Inverted#4BEAF7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4E4401no red cones; affects about 1% of men; ΔE 63.9 from the original

Deuteranopia#746600no green cones; the most common form, about 1% of men; ΔE 63.3 from the original

Tritanopia#C70016no blue cones; rare, and affects men and women equally; ΔE 8.5 from the original

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

Contrast with white, large text6.88:1WCAG large text: AAA

Contrast with black, large text3.05:1WCAG large text: AA

Named colours

Firebrick · ΔE 11.9 Dark red · ΔE 15.1 Maroon · ΔE 20.1 Brown · ΔE 20.8 Crimson · ΔE 21.4 Tomato · ΔE 24.1

Nearest named CSS colourFirebrick (#B22222)ΔE 11.87, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#08A7B4

Analogous#B40851, #B46B08

Triadic#08B415, #1508B4

Split complementary#08B46B, #0851B4

Tetradic#51B408, #08A7B4, #6B08B4

Tints, shades & saturation

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

Lighter +40%#FA968E

Lighter +30%#F8695D

Lighter +20%#F63C2C

Lighter +10%#E51B0A

Darker −10%#830F06

Darker −20%#520A04

Darker −30%#220401

Darker −40%#000000

More saturated +25%#BC0E00

Less saturated −25%#9D2920

Channel breakdown

R180

G21

Red180 (70.6%)

Green21 (8.2%)

Blue8 (3.1%)

Hue4.53°

Saturation (HSL)91.49%

Lightness36.86%

Dominant channelRed

Hex per channelR B4 · G 15 · B 08

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B41508 (chemical formula)

Formula
448,701.48 g/mol
41508 atoms

B41508 has a molar mass of 448,701.48 g/mol, made up of 41508 atoms across 1 element: 41508 × B.

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Molar mass

Molar mass448,701.48 g/mol

Total atoms per molecule41508

Distinct elements1

Mass of one molecule7.4508634 × 10^-19 g

Molecules per gram1.3421263 × 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 × 41508)448,701.48 g/mol, 100%

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Elements in this formula

Boron

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