Recognised as Colour

#CA2F23

#CA2F23
Red
Dark
Nearest: Firebrick

#CA2F23 is a red with RGB values 202, 47, 35 and HSL 4°, 70%, 46%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CA2F23#CA2F23

HEX#CA2F23

RGBrgb(202, 47, 35)

RGB (0–1)0.7922, 0.1843, 0.1373

RGB percentages79.2%, 18.4%, 13.7%

HSLhsl(4.3, 70.5%, 46.5%)

HSV / HSBhsv(4.3, 82.7%, 79.2%)

CMYK0%, 76.7%, 82.7%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,250,339

CSS custom property--colour: #CA2F23;

Brightness & contrast

Relative luminance0.14711WCAG 2.x, 0 is black and 1 is white

Perceived brightness116.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.33:1

Contrast with white5.33:1WCAG normal text: AA

Contrast with black3.94:1WCAG normal text: Fail

Greyscale equivalent#4F4F4F

Inverted#35D0DC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#60551Fno red cones; affects about 1% of men; ΔE 63.9 from the original

Deuteranopia#86771Ano green cones; the most common form, about 1% of men; ΔE 64.1 from the original

Tritanopia#DF002Eno blue cones; rare, and affects men and women equally; ΔE 14.2 from the original

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

Contrast with white, large text5.33:1WCAG large text: AAA

Contrast with black, large text3.94:1WCAG large text: AA

Named colours

Firebrick · ΔE 9.9 Crimson · ΔE 16.2 Tomato · ΔE 17.1 Brown · ΔE 18.7 Dark red · ΔE 19.3 Maroon · ΔE 23.6

Nearest named CSS colourFirebrick (#B22222)ΔE 9.9, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#23BECA

Analogous#CA236A, #CA8323

Triadic#23CA2F, #2F23CA

Split complementary#23CA83, #236ACA

Tetradic#6ACA23, #23BECA, #8323CA

Tints, shades & saturation

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

Lighter +40%#F5C8C4

Lighter +30%#ED9F99

Lighter +20%#E6766D

Lighter +10%#DE4D42

Darker −10%#9F251B

Darker −20%#731B14

Darker −30%#48110C

Darker −40%#1C0705

More saturated +25%#E81605

Less saturated −25%#AC4841

Channel breakdown

R202

G47

B35

Red202 (79.2%)

Green47 (18.4%)

Blue35 (13.7%)

Hue4.31°

Saturation (HSL)70.46%

Lightness46.47%

Dominant channelRed

Hex per channelR CA · G 2F · B 23

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca2F23 (chemical formula)

Formula
517.11 g/mol
25 atoms

Ca2F23 has a molar mass of 517.11 g/mol, made up of 25 atoms across 2 elements: 2 × Ca, 23 × F.

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Molar mass

Molar mass517.11 g/mol

Total atoms per molecule25

Distinct elements2

Mass of one molecule8.5868136 × 10^-22 g

Molecules per gram1.1645763 × 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

Ca15.5%

F84.5%

Calcium (Ca × 2)80.156 g/mol, 15.501%

Fluorine (F × 23)436.954 g/mol, 84.499%

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