Recognised as Colour

#C91507

#C91507
Red
Dark
Nearest: Firebrick

#C91507 is a red with RGB values 201, 21, 7 and HSL 4°, 93%, 41%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C91507#C91507

HEX#C91507

RGBrgb(201, 21, 7)

RGB (0–1)0.7882, 0.0824, 0.0275

RGB percentages78.8%, 8.2%, 2.7%

HSLhsl(4.3, 93.3%, 40.8%)

HSV / HSBhsv(4.3, 96.5%, 78.8%)

CMYK0%, 89.6%, 96.5%, 21.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,178,119

CSS custom property--colour: #C91507;

Brightness & contrast

Relative luminance0.12969WCAG 2.x, 0 is black and 1 is white

Perceived brightness111.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.84:1

Contrast with white5.84:1WCAG normal text: AA

Contrast with black3.59:1WCAG normal text: Fail

Greyscale equivalent#3A3A3A

Inverted#36EAF8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#574C00no red cones; affects about 1% of men; ΔE 70.1 from the original

Deuteranopia#817200no green cones; the most common form, about 1% of men; ΔE 69.6 from the original

Tritanopia#DE0017no blue cones; rare, and affects men and women equally; ΔE 8.6 from the original

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

Contrast with white, large text5.84:1WCAG large text: AAA

Contrast with black, large text3.59:1WCAG large text: AA

Named colours

Firebrick · ΔE 19 Orange red · ΔE 21.2 Crimson · ΔE 21.9 Tomato · ΔE 22 Red · ΔE 22.8 Dark red · ΔE 23.8

Nearest named CSS colourFirebrick (#B22222)ΔE 19.02, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#07BBC9

Analogous#C9075A, #C97607

Triadic#07C915, #1507C9

Split complementary#07C976, #075AC9

Tetradic#5AC907, #07BBC9, #7607C9

Tints, shades & saturation

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

Lighter +40%#FCA7A0

Lighter +30%#FA796F

Lighter +20%#F84B3E

Lighter +10%#F71D0C

Darker −10%#981005

Darker −20%#660B04

Darker −30%#350602

Darker −40%#040000

More saturated +25%#D00F00

Less saturated −25%#AF2B21

Channel breakdown

R201

G21

Red201 (78.8%)

Green21 (8.2%)

Blue7 (2.7%)

Hue4.33°

Saturation (HSL)93.27%

Lightness40.78%

Dominant channelRed

Hex per channelR C9 · G 15 · B 07

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C91507 (chemical formula)

Formula
1,099,090.577 g/mol
91507 atoms

C91507 has a molar mass of 1,099,090.577 g/mol, made up of 91507 atoms across 1 element: 91507 × C.

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Molar mass

Molar mass1,099,090.577 g/mol

Total atoms per molecule91507

Distinct elements1

Mass of one molecule1.8250828 × 10^-18 g

Molecules per gram5.4792033 × 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 × 91507)1,099,090.577 g/mol, 100%

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Elements in this formula

Carbon

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