Recognised as Colour

#B13531

#B13531
Red
Dark
Nearest: Brown

#B13531 is a red with RGB values 177, 53, 49 and HSL 2°, 57%, 44%. It is a dark colour, so white text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B13531#B13531

HEX#B13531

RGBrgb(177, 53, 49)

RGB (0–1)0.6941, 0.2078, 0.1922

RGB percentages69.4%, 20.8%, 19.2%

HSLhsl(1.9, 56.6%, 44.3%)

HSV / HSBhsv(1.9, 72.3%, 69.4%)

CMYK0%, 70.1%, 72.3%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,613,489

CSS custom property--colour: #B13531;

Brightness & contrast

Relative luminance0.12115WCAG 2.x, 0 is black and 1 is white

Perceived brightness106.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.13:1

Contrast with white6.13:1WCAG normal text: AA

Contrast with black3.42:1WCAG normal text: Fail

Greyscale equivalent#4F4F4F

Inverted#4ECACE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#58512Fno red cones; affects about 1% of men; ΔE 53.9 from the original

Deuteranopia#776C2Dno green cones; the most common form, about 1% of men; ΔE 54.3 from the original

Tritanopia#C30B35no blue cones; rare, and affects men and women equally; ΔE 15.8 from the original

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

Contrast with white, large text6.13:1WCAG large text: AAA

Contrast with black, large text3.42:1WCAG large text: AA

Named colours

Brown · ΔE 4 Firebrick · ΔE 9 Indian red · ΔE 16 Dark red · ΔE 16.6 Maroon · ΔE 17.3 Sienna · ΔE 21

Nearest named CSS colourBrown (#A52A2A)ΔE 3.98, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#31ADB1

Analogous#B1316D, #B17531

Triadic#31B135, #3531B1

Split complementary#31B175, #316DB1

Tetradic#6DB131, #31ADB1, #7531B1

Tints, shades & saturation

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

Lighter +40%#EEC2C0

Lighter +30%#E39B98

Lighter +20%#D87470

Lighter +10%#CC4D49

Darker −10%#892926

Darker −20%#611D1B

Darker −30%#391110

Darker −40%#110505

More saturated +25%#CD1B15

Less saturated −25%#954F4D

Channel breakdown

R177

G53

B49

Red177 (69.4%)

Green53 (20.8%)

Blue49 (19.2%)

Hue1.88°

Saturation (HSL)56.64%

Lightness44.31%

Dominant channelRed

Hex per channelR B1 · G 35 · B 31

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

B13531 (chemical formula)

Formula
146,270.11 g/mol
13531 atoms

B13531 has a molar mass of 146,270.11 g/mol, made up of 13531 atoms across 1 element: 13531 × B.

Open this reading on its own page →

Molar mass

Molar mass146,270.11 g/mol

Total atoms per molecule13531

Distinct elements1

Mass of one molecule2.4288723 × 10^-19 g

Molecules per gram4.117137 × 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 × 13531)146,270.11 g/mol, 100%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Boron

Nerdulate something else

Nothing in mind? Surprise me · today’s page