Recognised as Colour

#CA1637

#CA1637
Red
Dark
Nearest: Crimson

#CA1637 is a red with RGB values 202, 22, 55 and HSL 349°, 80%, 44%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#CA1637#CA1637

HEX#CA1637

RGBrgb(202, 22, 55)

RGB (0–1)0.7922, 0.0863, 0.2157

RGB percentages79.2%, 8.6%, 21.6%

HSLhsl(349, 80.4%, 43.9%)

HSV / HSBhsv(349, 89.1%, 79.2%)

CMYK0%, 89.1%, 72.8%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,243,959

CSS custom property--colour: #CA1637;

Brightness & contrast

Relative luminance0.13406WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.7:1

Contrast with white5.7:1WCAG normal text: AA

Contrast with black3.68:1WCAG normal text: Fail

Greyscale equivalent#3F3F3F

Inverted#35E9C8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#554F36no red cones; affects about 1% of men; ΔE 70.2 from the original

Deuteranopia#807331no green cones; the most common form, about 1% of men; ΔE 70 from the original

Tritanopia#DE0027no blue cones; rare, and affects men and women equally; ΔE 15.8 from the original

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

Contrast with white, large text5.7:1WCAG large text: AAA

Contrast with black, large text3.68:1WCAG large text: AA

Named colours

Crimson · ΔE 6.6 Firebrick · ΔE 12.5 Brown · ΔE 17.2 Dark red · ΔE 23.5 Indian red · ΔE 25.1 Tomato · ΔE 25.4

Nearest named CSS colourCrimson (#DC143C)ΔE 6.62, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#16CAA9

Analogous#CA1691, #CA4F16

Triadic#37CA16, #1637CA

Split complementary#16CA4F, #1691CA

Tetradic#91CA16, #16CAA9, #4F16CA

Tints, shades & saturation

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

Lighter +40%#F7B5C1

Lighter +30%#F2879B

Lighter +20%#ED5974

Lighter +10%#E82B4E

Darker −10%#9C112A

Darker −20%#6E0C1E

Darker −30%#400711

Darker −40%#120205

More saturated +25%#E00029

Less saturated −25%#AE3249

Channel breakdown

R202

G22

B55

Red202 (79.2%)

Green22 (8.6%)

Blue55 (21.6%)

Hue349°

Saturation (HSL)80.36%

Lightness43.92%

Dominant channelRed

Hex per channelR CA · G 16 · B 37

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca1637 (chemical formula)

Formula
65,607.686 g/mol
1637 atoms

Ca1637 has a molar mass of 65,607.686 g/mol, made up of 1637 atoms across 1 element: 1637 × Ca.

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Molar mass

Molar mass65,607.686 g/mol

Total atoms per molecule1637

Distinct elements1

Mass of one molecule1.0894413 × 10^-19 g

Molecules per gram9.1790172 × 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 × 1637)65,607.686 g/mol, 100%

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Elements in this formula

Calcium

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