Recognised as Colour

#FC400F

#FC400F
Red
Dark
Nearest: Orange red

#FC400F is a red with RGB values 252, 64, 15 and HSL 12°, 98%, 52%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FC400F#FC400F

HEX#FC400F

RGBrgb(252, 64, 15)

RGB (0–1)0.9882, 0.251, 0.0588

RGB percentages98.8%, 25.1%, 5.9%

HSLhsl(12.4, 97.5%, 52.4%)

HSV / HSBhsv(12.4, 94%, 98.8%)

CMYK0%, 74.6%, 94%, 1.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,531,471

CSS custom property--colour: #FC400F;

Brightness & contrast

Relative luminance0.24397WCAG 2.x, 0 is black and 1 is white

Perceived brightness146.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.88:1

Contrast with white3.57:1WCAG normal text: Fail

Contrast with black5.88:1WCAG normal text: AA

Greyscale equivalent#646464

Inverted#03BFF0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7C6D00no red cones; affects about 1% of men; ΔE 74.7 from the original

Deuteranopia#AA9700no green cones; the most common form, about 1% of men; ΔE 74.8 from the original

Tritanopia#FF0039no blue cones; rare, and affects men and women equally; ΔE 24 from the original

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

Contrast with white, large text3.57:1WCAG large text: AA

Contrast with black, large text5.88:1WCAG large text: AAA

Named colours

Orange red · ΔE 4.2 Red · ΔE 12.2 Tomato · ΔE 22.2 Coral · ΔE 31 Chocolate · ΔE 32.6 Crimson · ΔE 32.8

Nearest named CSS colourOrange red (#FF4500)ΔE 4.25, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0FCBFC

Analogous#FC0F55, #FCB70F

Triadic#0FFC40, #400FFC

Split complementary#0FFCB6, #0F55FC

Tetradic#54FC0F, #0FCBFC, #B60FFC

Tints, shades & saturation

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

Lighter +40%#FFE0D8

Lighter +30%#FEB8A6

Lighter +20%#FD9074

Lighter +10%#FD6841

Darker −10%#D52E03

Darker −20%#A32302

Darker −30%#711801

Darker −40%#3E0D01

More saturated +25%#FF3E0C

Less saturated −25%#DE522D

Channel breakdown

R252

G64

B15

Red252 (98.8%)

Green64 (25.1%)

Blue15 (5.9%)

Hue12.41°

Saturation (HSL)97.53%

Lightness52.35%

Dominant channelRed

Hex per channelR FC · G 40 · B 0F

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

FC400F (chemical formula)

Formula
4,842.396 g/mol
402 atoms

FC400F has a molar mass of 4,842.396 g/mol, made up of 402 atoms across 2 elements: 2 × F, 400 × C.

Open this reading on its own page →

Molar mass

Molar mass4,842.396 g/mol

Total atoms per molecule402

Distinct elements2

Mass of one molecule8.0409877 × 10^-21 g

Molecules per gram1.2436283 × 10^20

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

F0.8%

C99.2%

Fluorine (F × 2)37.996 g/mol, 0.785%

Carbon (C × 400)4,804.4 g/mol, 99.215%

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