Recognised as Colour

#CB2C33

#CB2C33
Red
Dark
Nearest: Firebrick

#CB2C33 is a red with RGB values 203, 44, 51 and HSL 357°, 64%, 48%. 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

#CB2C33#CB2C33

HEX#CB2C33

RGBrgb(203, 44, 51)

RGB (0–1)0.7961, 0.1725, 0.2

RGB percentages79.6%, 17.3%, 20%

HSLhsl(357.4, 64.4%, 48.4%)

HSV / HSBhsv(357.4, 78.3%, 79.6%)

CMYK0%, 78.3%, 74.9%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,315,123

CSS custom property--colour: #CB2C33;

Brightness & contrast

Relative luminance0.14737WCAG 2.x, 0 is black and 1 is white

Perceived brightness117.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.32:1

Contrast with white5.32:1WCAG normal text: AA

Contrast with black3.95:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#34D3CC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5D5531no red cones; affects about 1% of men; ΔE 65.6 from the original

Deuteranopia#85772Dno green cones; the most common form, about 1% of men; ΔE 65.3 from the original

Tritanopia#E00031no blue cones; rare, and affects men and women equally; ΔE 13.3 from the original

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

Contrast with white, large text5.32:1WCAG large text: AAA

Contrast with black, large text3.95:1WCAG large text: AA

Named colours

Firebrick · ΔE 8.1 Crimson · ΔE 10.4 Brown · ΔE 14.7 Tomato · ΔE 20.1 Dark red · ΔE 20.6 Indian red · ΔE 22.8

Nearest named CSS colourFirebrick (#B22222)ΔE 8.15, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2CCBC4

Analogous#CB2C83, #CB752C

Triadic#33CB2C, #2C33CB

Split complementary#2CCB75, #2C82CB

Tetradic#82CB2C, #2CCBC4, #742CCB

Tints, shades & saturation

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

Lighter +40%#F4CFD0

Lighter +30%#EBA5A8

Lighter +20%#E27B7F

Lighter +10%#D95157

Darker −10%#A12328

Darker −20%#771A1E

Darker −30%#4D1113

Darker −40%#230809

More saturated +25%#EA0D17

Less saturated −25%#AC4B4F

Channel breakdown

R203

G44

B51

Red203 (79.6%)

Green44 (17.3%)

Blue51 (20%)

Hue357.36°

Saturation (HSL)64.37%

Lightness48.43%

Dominant channelRed

Hex per channelR CB · G 2C · B 33

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

CB2C33 (chemical formula)

Formula
429.994 g/mol
36 atoms

CB2C33 has a molar mass of 429.994 g/mol, made up of 36 atoms across 2 elements: 34 × C, 2 × B.

Open this reading on its own page →

Molar mass

Molar mass429.994 g/mol

Total atoms per molecule36

Distinct elements2

Mass of one molecule7.1402184 × 10^-22 g

Molecules per gram1.4005174 × 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

C95%

B5%

Carbon (C × 34)408.374 g/mol, 94.972%

Boron (B × 2)21.62 g/mol, 5.028%

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