Recognised as Colour

#B52745

#B52745
Red
Dark
Nearest: Brown

#B52745 is a red with RGB values 181, 39, 69 and HSL 347°, 65%, 43%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B52745#B52745

HEX#B52745

RGBrgb(181, 39, 69)

RGB (0–1)0.7098, 0.1529, 0.2706

RGB percentages71%, 15.3%, 27.1%

HSLhsl(347.3, 64.5%, 43.1%)

HSV / HSBhsv(347.3, 78.5%, 71%)

CMYK0%, 78.5%, 61.9%, 29%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,872,069

CSS custom property--colour: #B52745;

Brightness & contrast

Relative luminance0.11704WCAG 2.x, 0 is black and 1 is white

Perceived brightness106 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.29:1

Contrast with white6.29:1WCAG normal text: AA

Contrast with black3.34:1WCAG normal text: Fail

Greyscale equivalent#474747

Inverted#4AD8BA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#504D45no red cones; affects about 1% of men; ΔE 59.4 from the original

Deuteranopia#746B41no green cones; the most common form, about 1% of men; ΔE 60.5 from the original

Tritanopia#C70034no blue cones; rare, and affects men and women equally; ΔE 16.5 from the original

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

Contrast with white, large text6.29:1WCAG large text: AAA

Contrast with black, large text3.34:1WCAG large text: AA

Named colours

Brown · ΔE 14.4 Indian red · ΔE 17.9 Firebrick · ΔE 19.2 Crimson · ΔE 21.5 Maroon · ΔE 26.3 Dark red · ΔE 26.7

Nearest named CSS colourBrown (#A52A2A)ΔE 14.42, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27B597

Analogous#B5278C, #B55027

Triadic#45B527, #2745B5

Split complementary#27B550, #278CB5

Tetradic#8CB527, #27B597, #5027B5

Tints, shades & saturation

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

Lighter +40%#F0B8C4

Lighter +30%#E78EA1

Lighter +20%#DE647E

Lighter +10%#D53A5B

Darker −10%#8B1E35

Darker −20%#611525

Darker −30%#370C15

Darker −40%#0D0305

More saturated +25%#D10C35

Less saturated −25%#9A4355

Channel breakdown

R181

G39

B69

Red181 (71%)

Green39 (15.3%)

Blue69 (27.1%)

Hue347.32°

Saturation (HSL)64.55%

Lightness43.14%

Dominant channelRed

Hex per channelR B5 · G 27 · B 45

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B52745 (chemical formula)

Formula
570,173.45 g/mol
52745 atoms

B52745 has a molar mass of 570,173.45 g/mol, made up of 52745 atoms across 1 element: 52745 × B.

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Molar mass

Molar mass570,173.45 g/mol

Total atoms per molecule52745

Distinct elements1

Mass of one molecule9.4679529 × 10^-19 g

Molecules per gram1.0561945 × 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 × 52745)570,173.45 g/mol, 100%

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Elements in this formula

Boron

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