Recognised as Colour

#CA2F10

#CA2F10
Red
Dark
Nearest: Firebrick

#CA2F10 is a red with RGB values 202, 47, 16 and HSL 10°, 85%, 43%. 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

#CA2F10#CA2F10

HEX#CA2F10

RGBrgb(202, 47, 16)

RGB (0–1)0.7922, 0.1843, 0.0627

RGB percentages79.2%, 18.4%, 6.3%

HSLhsl(10, 85.3%, 42.7%)

HSV / HSBhsv(10, 92.1%, 79.2%)

CMYK0%, 76.7%, 92.1%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,250,320

CSS custom property--colour: #CA2F10;

Brightness & contrast

Relative luminance0.14627WCAG 2.x, 0 is black and 1 is white

Perceived brightness116.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.35:1

Contrast with white5.35:1WCAG normal text: AA

Contrast with black3.93:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#35D0EF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#615506no red cones; affects about 1% of men; ΔE 63.9 from the original

Deuteranopia#867700no green cones; the most common form, about 1% of men; ΔE 64.3 from the original

Tritanopia#DF002Bno blue cones; rare, and affects men and women equally; ΔE 17.1 from the original

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

Contrast with white, large text5.35:1WCAG large text: AAA

Contrast with black, large text3.93:1WCAG large text: AA

Named colours

Firebrick · ΔE 16.6 Tomato · ΔE 18.3 Dark red · ΔE 22 Orange red · ΔE 22.2 Crimson · ΔE 22.8 Chocolate · ΔE 24.7

Nearest named CSS colourFirebrick (#B22222)ΔE 16.62, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#10ABCA

Analogous#CA104E, #CA8C10

Triadic#10CA2F, #2F10CA

Split complementary#10CA8C, #104ECA

Tetradic#4ECA10, #10ABCA, #8C10CA

Tints, shades & saturation

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

Lighter +40%#F9BAAD

Lighter +30%#F5927E

Lighter +20%#F16A4F

Lighter +10%#ED4220

Darker −10%#9B240C

Darker −20%#6B1909

Darker −30%#3C0E05

Darker −40%#0D0301

More saturated +25%#DA2400

Less saturated −25%#AF412B

Channel breakdown

R202

G47

B16

Red202 (79.2%)

Green47 (18.4%)

Blue16 (6.3%)

Hue10°

Saturation (HSL)85.32%

Lightness42.75%

Dominant channelRed

Hex per channelR CA · G 2F · B 10

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca2F10 (chemical formula)

Formula
270.136 g/mol
12 atoms

Ca2F10 has a molar mass of 270.136 g/mol, made up of 12 atoms across 2 elements: 2 × Ca, 10 × F.

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Molar mass

Molar mass270.136 g/mol

Total atoms per molecule12

Distinct elements2

Mass of one molecule4.4857138 × 10^-22 g

Molecules per gram2.2292996 × 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

Ca29.7%

F70.3%

Calcium (Ca × 2)80.156 g/mol, 29.672%

Fluorine (F × 10)189.98 g/mol, 70.328%

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