Recognised as Colour

#CB2545

#CB2545
Red
Dark
Nearest: Crimson

#CB2545 is a red with RGB values 203, 37, 69 and HSL 348°, 69%, 47%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#CB2545#CB2545

HEX#CB2545

RGBrgb(203, 37, 69)

RGB (0–1)0.7961, 0.1451, 0.2706

RGB percentages79.6%, 14.5%, 27.1%

HSLhsl(348.4, 69.2%, 47.1%)

HSV / HSBhsv(348.4, 81.8%, 79.6%)

CMYK0%, 81.8%, 66%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,313,349

CSS custom property--colour: #CB2545;

Brightness & contrast

Relative luminance0.14449WCAG 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 5.4:1

Contrast with white5.4:1WCAG normal text: AA

Contrast with black3.89:1WCAG normal text: Fail

Greyscale equivalent#4B4B4B

Inverted#34DABA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#585445no red cones; affects about 1% of men; ΔE 67.3 from the original

Deuteranopia#827640no green cones; the most common form, about 1% of men; ΔE 67.3 from the original

Tritanopia#DF0033no blue cones; rare, and affects men and women equally; ΔE 17.2 from the original

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

Contrast with white, large text5.4:1WCAG large text: AAA

Contrast with black, large text3.89:1WCAG large text: AA

Named colours

Crimson · ΔE 11.6 Firebrick · ΔE 16.1 Brown · ΔE 16.9 Indian red · ΔE 20.9 Dark red · ΔE 26.8 Maroon · ΔE 28.2

Nearest named CSS colourCrimson (#DC143C)ΔE 11.65, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#25CBAB

Analogous#CB2598, #CB5825

Triadic#45CB25, #2545CB

Split complementary#25CB58, #2598CB

Tetradic#98CB25, #25CBAB, #5825CB

Tints, shades & saturation

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

Lighter +40%#F5C7D0

Lighter +30%#ED9CAC

Lighter +20%#E57187

Lighter +10%#DD4663

Darker −10%#A01D36

Darker −20%#751528

Darker −30%#4A0D19

Darker −40%#1E060A

More saturated +25%#E90733

Less saturated −25%#AD4357

Channel breakdown

R203

G37

B69

Red203 (79.6%)

Green37 (14.5%)

Blue69 (27.1%)

Hue348.43°

Saturation (HSL)69.17%

Lightness47.06%

Dominant channelRed

Hex per channelR CB · G 25 · B 45

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB2545 (chemical formula)

Formula
27,523.461 g/mol
2546 atoms

CB2545 has a molar mass of 27,523.461 g/mol, made up of 2546 atoms across 2 elements: 1 × C, 2545 × B.

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Molar mass

Molar mass27,523.461 g/mol

Total atoms per molecule2546

Distinct elements2

Mass of one molecule4.5703782 × 10^-20 g

Molecules per gram2.1880027 × 10^19

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

C0%

B100%

Carbon (C)12.011 g/mol, 0.044%

Boron (B × 2545)27,511.45 g/mol, 99.956%

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