Recognised as Colour

#FC2904

#FC2904
Red
Dark
Nearest: Red

#FC2904 is a red with RGB values 252, 41, 4 and HSL 9°, 98%, 50%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FC2904#FC2904

HEX#FC2904

RGBrgb(252, 41, 4)

RGB (0–1)0.9882, 0.1608, 0.0157

RGB percentages98.8%, 16.1%, 1.6%

HSLhsl(9, 97.6%, 50.2%)

HSV / HSBhsv(9, 98.4%, 98.8%)

CMYK0%, 83.7%, 98.4%, 1.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,525,572

CSS custom property--colour: #FC2904;

Brightness & contrast

Relative luminance0.2229WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.46:1

Contrast with white3.85:1WCAG normal text: Fail

Contrast with black5.46:1WCAG normal text: AA

Greyscale equivalent#535353

Inverted#03D6FB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#736500no red cones; affects about 1% of men; ΔE 81.2 from the original

Deuteranopia#A59200no green cones; the most common form, about 1% of men; ΔE 80.3 from the original

Tritanopia#FF0027no blue cones; rare, and affects men and women equally; ΔE 13.8 from the original

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

Contrast with white, large text3.85:1WCAG large text: AA

Contrast with black, large text5.46:1WCAG large text: AAA

Named colours

Red · ΔE 5.8 Orange red · ΔE 7.9 Tomato · ΔE 27.1 Crimson · ΔE 33.7 Coral · ΔE 37 Firebrick · ΔE 37.4

Nearest named CSS colourRed (#FF0000)ΔE 5.78, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#04D7FC

Analogous#FC045B, #FCA504

Triadic#04FC29, #2904FC

Split complementary#04FCA5, #045BFC

Tetradic#5BFC04, #04D7FC, #A504FC

Tints, shades & saturation

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

Lighter +40%#FED5CE

Lighter +30%#FEAA9B

Lighter +20%#FD7F69

Lighter +10%#FD5436

Darker −10%#CB2002

Darker −20%#981802

Darker −30%#661001

Darker −40%#330801

More saturated +25%#FF2701

Less saturated −25%#DC3F24

Channel breakdown

R252

G41

Red252 (98.8%)

Green41 (16.1%)

Blue4 (1.6%)

Hue8.95°

Saturation (HSL)97.64%

Lightness50.2%

Dominant channelRed

Hex per channelR FC · G 29 · B 04

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FC2904 (chemical formula)

Formula
34,898.942 g/mol
2905 atoms

FC2904 has a molar mass of 34,898.942 g/mol, made up of 2905 atoms across 2 elements: 1 × F, 2904 × C.

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Molar mass

Molar mass34,898.942 g/mol

Total atoms per molecule2905

Distinct elements2

Mass of one molecule5.7951057 × 10^-20 g

Molecules per gram1.7255941 × 10^19

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

F0.1%

C99.9%

Fluorine (F)18.998 g/mol, 0.054%

Carbon (C × 2904)34,879.944 g/mol, 99.946%

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