Recognised as Colour

#C30900

#C30900
Red
Dark
Nearest: Firebrick

#C30900 is a red with RGB values 195, 9, 0 and HSL 3°, 100%, 38%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C30900#C30900

HEX#C30900

RGBrgb(195, 9, 0)

RGB (0–1)0.7647, 0.0353, 0

RGB percentages76.5%, 3.5%, 0%

HSLhsl(2.8, 100%, 38.2%)

HSV / HSBhsv(2.8, 100%, 76.5%)

CMYK0%, 95.4%, 100%, 23.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,781,824

CSS custom property--colour: #C30900;

Brightness & contrast

Relative luminance0.11797WCAG 2.x, 0 is black and 1 is white

Perceived brightness106.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.25:1

Contrast with white6.25:1WCAG normal text: AA

Contrast with black3.36:1WCAG normal text: Fail

Greyscale equivalent#303030

Inverted#3CF6FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#534800no red cones; affects about 1% of men; ΔE 70.1 from the original

Deuteranopia#7C6E00no green cones; the most common form, about 1% of men; ΔE 69.7 from the original

Tritanopia#D8000Eno blue cones; rare, and affects men and women equally; ΔE 7.5 from the original

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

Contrast with white, large text6.25:1WCAG large text: AAA

Contrast with black, large text3.36:1WCAG large text: AA

Named colours

Firebrick · ΔE 19.5 Orange red · ΔE 22 Dark red · ΔE 23.2 Crimson · ΔE 23.2 Red · ΔE 23.3 Tomato · ΔE 23.9

Nearest named CSS colourFirebrick (#B22222)ΔE 19.48, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00BAC3

Analogous#C30059, #C36B00

Triadic#00C309, #0900C3

Split complementary#00C36A, #0059C3

Tetradic#58C300, #00BAC3, #6A00C3

Tints, shades & saturation

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

Lighter +40%#FF9590

Lighter +30%#FF645D

Lighter +20%#FF342A

Lighter +10%#F60B00

Darker −10%#900700

Darker −20%#5D0400

Darker −30%#2A0200

Darker −40%#000000

More saturated +25%#C30900

Less saturated −25%#AB1F18

Channel breakdown

R195

Red195 (76.5%)

Green9 (3.5%)

Blue0 (0%)

Hue2.77°

Saturation (HSL)100%

Lightness38.24%

Dominant channelRed

Hex per channelR C3 · G 09 · B 00

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

C30900 (chemical formula)

Formula
371,139.9 g/mol
30900 atoms

C30900 has a molar mass of 371,139.9 g/mol, made up of 30900 atoms across 1 element: 30900 × C.

Open this reading on its own page →

Molar mass

Molar mass371,139.9 g/mol

Total atoms per molecule30900

Distinct elements1

Mass of one molecule6.162923 × 10^-19 g

Molecules per gram1.6226067 × 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

C100%

Carbon (C × 30900)371,139.9 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

Carbon

Nerdulate something else

Nothing in mind? Surprise me · today’s page