Recognised as Colour

#CA1B39

#CA1B39
Red
Dark
Nearest: Crimson

#CA1B39 is a red with RGB values 202, 27, 57 and HSL 350°, 76%, 45%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#CA1B39#CA1B39

HEX#CA1B39

RGBrgb(202, 27, 57)

RGB (0–1)0.7922, 0.1059, 0.2235

RGB percentages79.2%, 10.6%, 22.4%

HSLhsl(349.7, 76.4%, 44.9%)

HSV / HSBhsv(349.7, 86.6%, 79.2%)

CMYK0%, 86.6%, 71.8%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,245,241

CSS custom property--colour: #CA1B39;

Brightness & contrast

Relative luminance0.13636WCAG 2.x, 0 is black and 1 is white

Perceived brightness114 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.63:1

Contrast with white5.63:1WCAG normal text: AA

Contrast with black3.73:1WCAG normal text: Fail

Greyscale equivalent#424242

Inverted#35E4C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#565038no red cones; affects about 1% of men; ΔE 69.3 from the original

Deuteranopia#807433no green cones; the most common form, about 1% of men; ΔE 69.6 from the original

Tritanopia#DE002Ano blue cones; rare, and affects men and women equally; ΔE 15.4 from the original

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

Contrast with white, large text5.63:1WCAG large text: AAA

Contrast with black, large text3.73:1WCAG large text: AA

Named colours

Crimson · ΔE 7.4 Firebrick · ΔE 12.4 Brown · ΔE 16.6 Dark red · ΔE 23.6 Indian red · ΔE 24 Tomato · ΔE 25.4

Nearest named CSS colourCrimson (#DC143C)ΔE 7.39, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1BCAAC

Analogous#CA1B90, #CA551B

Triadic#39CA1B, #1B39CA

Split complementary#1BCA55, #1B90CA

Tetradic#90CA1B, #1BCAAC, #551BCA

Tints, shades & saturation

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

Lighter +40%#F6BBC5

Lighter +30%#F08E9F

Lighter +20%#EA6179

Lighter +10%#E43452

Darker −10%#9D152C

Darker −20%#700F20

Darker −30%#430913

Darker −40%#160306

More saturated +25%#E50027

Less saturated −25%#AD384C

Channel breakdown

R202

G27

B57

Red202 (79.2%)

Green27 (10.6%)

Blue57 (22.4%)

Hue349.71°

Saturation (HSL)76.42%

Lightness44.9%

Dominant channelRed

Hex per channelR CA · G 1B · B 39

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

Ca1B39 (chemical formula)

Formula
461.668 g/mol
40 atoms

Ca1B39 has a molar mass of 461.668 g/mol, made up of 40 atoms across 2 elements: 1 × Ca, 39 × B.

Open this reading on its own page →

Molar mass

Molar mass461.668 g/mol

Total atoms per molecule40

Distinct elements2

Mass of one molecule7.6661775 × 10^-22 g

Molecules per gram1.3044311 × 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

Ca8.7%

B91.3%

Calcium (Ca)40.078 g/mol, 8.681%

Boron (B × 39)421.59 g/mol, 91.319%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Nerdulate something else

Nothing in mind? Surprise me · today’s page