Recognised as Colour

#CA4B2B

#CA4B2B
Red
Dark
Nearest: Firebrick

#CA4B2B is a red with RGB values 202, 75, 43 and HSL 12°, 65%, 48%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CA4B2B#CA4B2B

HEX#CA4B2B

RGBrgb(202, 75, 43)

RGB (0–1)0.7922, 0.2941, 0.1686

RGB percentages79.2%, 29.4%, 16.9%

HSLhsl(12.1, 64.9%, 48%)

HSV / HSBhsv(12.1, 78.7%, 79.2%)

CMYK0%, 62.9%, 78.7%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,257,515

CSS custom property--colour: #CA4B2B;

Brightness & contrast

Relative luminance0.17763WCAG 2.x, 0 is black and 1 is white

Perceived brightness125.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.61:1

Contrast with white4.61:1WCAG normal text: AA

Contrast with black4.55:1WCAG normal text: AA

Greyscale equivalent#646464

Inverted#35B4D4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F6326no red cones; affects about 1% of men; ΔE 53.4 from the original

Deuteranopia#8E7F26no green cones; the most common form, about 1% of men; ΔE 53.8 from the original

Tritanopia#DE2A45no blue cones; rare, and affects men and women equally; ΔE 23.3 from the original

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

Contrast with white, large text4.61:1WCAG large text: AAA

Contrast with black, large text4.55:1WCAG large text: AAA

Named colours

Firebrick · ΔE 14.1 Tomato · ΔE 15.9 Brown · ΔE 18.2 Chocolate · ΔE 18.3 Coral · ΔE 18.7 Dark red · ΔE 21.5

Nearest named CSS colourFirebrick (#B22222)ΔE 14.07, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BAACA

Analogous#CA2B5A, #CA9B2B

Triadic#2BCA4B, #4B2BCA

Split complementary#2BCA9B, #2B5ACA

Tetradic#5ACA2B, #2BAACA, #9B2BCA

Tints, shades & saturation

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

Lighter +40%#F4D5CD

Lighter +30%#EBB1A3

Lighter +20%#E28E79

Lighter +10%#D96B4F

Darker −10%#A03B22

Darker −20%#762C19

Darker −30%#4C1C10

Darker −40%#220D07

More saturated +25%#E9390C

Less saturated −25%#AB5D4A

Channel breakdown

R202

G75

B43

Red202 (79.2%)

Green75 (29.4%)

Blue43 (16.9%)

Hue12.08°

Saturation (HSL)64.9%

Lightness48.04%

Dominant channelRed

Hex per channelR CA · G 4B · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca4B2B (chemical formula)

Formula
192.742 g/mol
7 atoms

Ca4B2B has a molar mass of 192.742 g/mol, made up of 7 atoms across 2 elements: 4 × Ca, 3 × B.

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Molar mass

Molar mass192.742 g/mol

Total atoms per molecule7

Distinct elements2

Mass of one molecule3.2005562 × 10^-22 g

Molecules per gram3.1244569 × 10^21

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

Ca83.2%

B16.8%

Calcium (Ca × 4)160.312 g/mol, 83.174%

Boron (B × 3)32.43 g/mol, 16.826%

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