Recognised as Colour

#C91633

#C91633
Red
Dark
Nearest: Crimson

#C91633 is a red with RGB values 201, 22, 51 and HSL 350°, 80%, 44%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#C91633#C91633

HEX#C91633

RGBrgb(201, 22, 51)

RGB (0–1)0.7882, 0.0863, 0.2

RGB percentages78.8%, 8.6%, 20%

HSLhsl(350.3, 80.3%, 43.7%)

HSV / HSBhsv(350.3, 89.1%, 78.8%)

CMYK0%, 89.1%, 74.6%, 21.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,178,419

CSS custom property--colour: #C91633;

Brightness & contrast

Relative luminance0.1323WCAG 2.x, 0 is black and 1 is white

Perceived brightness112.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.76:1

Contrast with white5.76:1WCAG normal text: AA

Contrast with black3.65:1WCAG normal text: Fail

Greyscale equivalent#3E3E3E

Inverted#36E9CC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#554E32no red cones; affects about 1% of men; ΔE 69.8 from the original

Deuteranopia#7F732Cno green cones; the most common form, about 1% of men; ΔE 70.4 from the original

Tritanopia#DE0025no blue cones; rare, and affects men and women equally; ΔE 15.1 from the original

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

Contrast with white, large text5.76:1WCAG large text: AAA

Contrast with black, large text3.65:1WCAG large text: AA

Named colours

Crimson · ΔE 6.7 Firebrick · ΔE 11.2 Brown · ΔE 17 Dark red · ΔE 22.3 Tomato · ΔE 24.3 Maroon · ΔE 25.2

Nearest named CSS colourCrimson (#DC143C)ΔE 6.73, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#16C9AC

Analogous#C9168D, #C95316

Triadic#33C916, #1633C9

Split complementary#16C952, #168DC9

Tetradic#8CC916, #16C9AC, #5216C9

Tints, shades & saturation

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

Lighter +40%#F7B4BF

Lighter +30%#F28698

Lighter +20%#ED5870

Lighter +10%#E82A49

Darker −10%#9B1127

Darker −20%#6D0C1C

Darker −30%#3F0710

Darker −40%#110204

More saturated +25%#DF0024

Less saturated −25%#AD3246

Channel breakdown

R201

G22

B51

Red201 (78.8%)

Green22 (8.6%)

Blue51 (20%)

Hue350.28°

Saturation (HSL)80.27%

Lightness43.73%

Dominant channelRed

Hex per channelR C9 · G 16 · B 33

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C91633 (chemical formula)

Formula
1,100,603.963 g/mol
91633 atoms

C91633 has a molar mass of 1,100,603.963 g/mol, made up of 91633 atoms across 1 element: 91633 × C.

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Molar mass

Molar mass1,100,603.963 g/mol

Total atoms per molecule91633

Distinct elements1

Mass of one molecule1.8275959 × 10^-18 g

Molecules per gram5.4716692 × 10^17

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

C100%

Carbon (C × 91633)1,100,603.963 g/mol, 100%

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Elements in this formula

Carbon

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