Recognised as Colour

#CB2713

#CB2713
Red
Dark
Nearest: Firebrick

#CB2713 is a red with RGB values 203, 39, 19 and HSL 7°, 83%, 44%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CB2713#CB2713

HEX#CB2713

RGBrgb(203, 39, 19)

RGB (0–1)0.7961, 0.1529, 0.0745

RGB percentages79.6%, 15.3%, 7.5%

HSLhsl(6.5, 82.9%, 43.5%)

HSV / HSBhsv(6.5, 90.6%, 79.6%)

CMYK0%, 80.8%, 90.6%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,313,811

CSS custom property--colour: #CB2713;

Brightness & contrast

Relative luminance0.14195WCAG 2.x, 0 is black and 1 is white

Perceived brightness115.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.47:1

Contrast with white5.47:1WCAG normal text: AA

Contrast with black3.84:1WCAG normal text: Fail

Greyscale equivalent#484848

Inverted#34D8EC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5E520Cno red cones; affects about 1% of men; ΔE 66.4 from the original

Deuteranopia#857600no green cones; the most common form, about 1% of men; ΔE 66.9 from the original

Tritanopia#E00025no blue cones; rare, and affects men and women equally; ΔE 12.7 from the original

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

Contrast with white, large text5.47:1WCAG large text: AAA

Contrast with black, large text3.84:1WCAG large text: AA

Named colours

Firebrick · ΔE 15.8 Tomato · ΔE 18.8 Crimson · ΔE 20.3 Dark red · ΔE 22 Orange red · ΔE 22.7 Brown · ΔE 25

Nearest named CSS colourFirebrick (#B22222)ΔE 15.83, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#13B7CB

Analogous#CB135B, #CB8313

Triadic#13CB27, #2713CB

Split complementary#13CB83, #135BCB

Tetradic#5BCB13, #13B7CB, #8313CB

Tints, shades & saturation

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

Lighter +40%#F8BAB2

Lighter +30%#F39084

Lighter +20%#EF6655

Lighter +10%#EB3C26

Darker −10%#9C1E0F

Darker −20%#6E150A

Darker −30%#3F0C06

Darker −40%#100302

More saturated +25%#DE1800

Less saturated −25%#AF3D2F

Channel breakdown

R203

G39

B19

Red203 (79.6%)

Green39 (15.3%)

Blue19 (7.5%)

Hue6.52°

Saturation (HSL)82.88%

Lightness43.53%

Dominant channelRed

Hex per channelR CB · G 27 · B 13

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB2713 (chemical formula)

Formula
29,339.541 g/mol
2714 atoms

CB2713 has a molar mass of 29,339.541 g/mol, made up of 2714 atoms across 2 elements: 1 × C, 2713 × B.

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Molar mass

Molar mass29,339.541 g/mol

Total atoms per molecule2714

Distinct elements2

Mass of one molecule4.8719454 × 10^-20 g

Molecules per gram2.0525682 × 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, 0.041%

Boron (B × 2713)29,327.53 g/mol, 99.959%

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