Recognised as Colour

#CA2805

#CA2805
Red
Dark
Nearest: Firebrick

#CA2805 is a red with RGB values 202, 40, 5 and HSL 11°, 95%, 41%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CA2805#CA2805

HEX#CA2805

RGBrgb(202, 40, 5)

RGB (0–1)0.7922, 0.1569, 0.0196

RGB percentages79.2%, 15.7%, 2%

HSLhsl(10.7, 95.2%, 40.6%)

HSV / HSBhsv(10.7, 97.5%, 79.2%)

CMYK0%, 80.2%, 97.5%, 20.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,248,517

CSS custom property--colour: #CA2805;

Brightness & contrast

Relative luminance0.14085WCAG 2.x, 0 is black and 1 is white

Perceived brightness114.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.5:1

Contrast with white5.5:1WCAG normal text: AA

Contrast with black3.82:1WCAG normal text: Fail

Greyscale equivalent#484848

Inverted#35D7FA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5E5200no red cones; affects about 1% of men; ΔE 66.1 from the original

Deuteranopia#857600no green cones; the most common form, about 1% of men; ΔE 66.1 from the original

Tritanopia#DF0024no blue cones; rare, and affects men and women equally; ΔE 15 from the original

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

Contrast with white, large text5.5:1WCAG large text: AAA

Contrast with black, large text3.82:1WCAG large text: AA

Named colours

Firebrick · ΔE 19.4 Orange red · ΔE 20 Tomato · ΔE 20.3 Dark red · ΔE 23.9 Red · ΔE 24.1 Crimson · ΔE 24.5

Nearest named CSS colourFirebrick (#B22222)ΔE 19.44, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#05A7CA

Analogous#CA0545, #CA8A05

Triadic#05CA28, #2805CA

Split complementary#05CA8B, #0544CA

Tetradic#45CA05, #05A7CA, #8B05CA

Tints, shades & saturation

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

Lighter +40%#FDAF9E

Lighter +30%#FB866D

Lighter +20%#FA5D3B

Lighter +10%#F93409

Darker −10%#981E04

Darker −20%#661403

Darker −30%#350A01

Darker −40%#030100

More saturated +25%#CF2500

Less saturated −25%#B0391F

Channel breakdown

R202

G40

Red202 (79.2%)

Green40 (15.7%)

Blue5 (2%)

Hue10.66°

Saturation (HSL)95.17%

Lightness40.59%

Dominant channelRed

Hex per channelR CA · G 28 · B 05

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

Ca2805 (chemical formula)

Formula
112,418.79 g/mol
2805 atoms

Ca2805 has a molar mass of 112,418.79 g/mol, made up of 2805 atoms across 1 element: 2805 × Ca.

Open this reading on its own page →

Molar mass

Molar mass112,418.79 g/mol

Total atoms per molecule2805

Distinct elements1

Mass of one molecule1.8667579 × 10^-19 g

Molecules per gram5.356881 × 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 × 2805)112,418.79 g/mol, 100%

Keep nerding

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

Elements in this formula

Calcium

Nerdulate something else

Nothing in mind? Surprise me · today’s page