Recognised as Colour

#CA3511

#CA3511
Red
Dark
Nearest: Firebrick

#CA3511 is a red with RGB values 202, 53, 17 and HSL 12°, 84%, 43%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CA3511#CA3511

HEX#CA3511

RGBrgb(202, 53, 17)

RGB (0–1)0.7922, 0.2078, 0.0667

RGB percentages79.2%, 20.8%, 6.7%

HSLhsl(11.7, 84.5%, 42.9%)

HSV / HSBhsv(11.7, 91.6%, 79.2%)

CMYK0%, 73.8%, 91.6%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,251,857

CSS custom property--colour: #CA3511;

Brightness & contrast

Relative luminance0.15143WCAG 2.x, 0 is black and 1 is white

Perceived brightness117.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.21:1

Contrast with white5.21:1WCAG normal text: AA

Contrast with black4.03:1WCAG normal text: Fail

Greyscale equivalent#525252

Inverted#35CAEE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#645706no red cones; affects about 1% of men; ΔE 61.6 from the original

Deuteranopia#887900no green cones; the most common form, about 1% of men; ΔE 62.5 from the original

Tritanopia#DF0030no blue cones; rare, and affects men and women equally; ΔE 20.4 from the original

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

Contrast with white, large text5.21:1WCAG large text: AAA

Contrast with black, large text4.03:1WCAG large text: AA

Named colours

Firebrick · ΔE 16.8 Tomato · ΔE 17.7 Dark red · ΔE 22.1 Orange red · ΔE 22.6 Chocolate · ΔE 22.6 Crimson · ΔE 23.9

Nearest named CSS colourFirebrick (#B22222)ΔE 16.78, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#11A6CA

Analogous#CA114A, #CA9211

Triadic#11CA35, #3511CA

Split complementary#11CA91, #114ACA

Tetradic#4ACA11, #11A6CA, #9111CA

Tints, shades & saturation

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

Lighter +40%#F8BDAF

Lighter +30%#F49680

Lighter +20%#F07051

Lighter +10%#EC4922

Darker −10%#9B290D

Darker −20%#6C1C09

Darker −30%#3D1005

Darker −40%#0E0401

More saturated +25%#DB2B00

Less saturated −25%#AF462C

Channel breakdown

R202

G53

B17

Red202 (79.2%)

Green53 (20.8%)

Blue17 (6.7%)

Hue11.68°

Saturation (HSL)84.47%

Lightness42.94%

Dominant channelRed

Hex per channelR CA · G 35 · B 11

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca3511 (chemical formula)

Formula
140,713.858 g/mol
3511 atoms

Ca3511 has a molar mass of 140,713.858 g/mol, made up of 3511 atoms across 1 element: 3511 × Ca.

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Molar mass

Molar mass140,713.858 g/mol

Total atoms per molecule3511

Distinct elements1

Mass of one molecule2.3366086 × 10^-19 g

Molecules per gram4.2797069 × 10^18

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

Ca100%

Calcium (Ca × 3511)140,713.858 g/mol, 100%

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Elements in this formula

Calcium

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