Recognised as Colour

#F20100

#F20100
Red
Dark
Nearest: Red

#F20100 is a red with RGB values 242, 1, 0 and HSL 0°, 100%, 47%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#F20100#F20100

HEX#F20100

RGBrgb(242, 1, 0)

RGB (0–1)0.949, 0.0039, 0

RGB percentages94.9%, 0.4%, 0%

HSLhsl(0.2, 100%, 47.5%)

HSV / HSBhsv(0.2, 100%, 94.9%)

CMYK0%, 99.6%, 100%, 5.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,859,968

CSS custom property--colour: #F20100;

Brightness & contrast

Relative luminance0.18899WCAG 2.x, 0 is black and 1 is white

Perceived brightness132.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.78:1

Contrast with white4.39:1WCAG normal text: Fail

Contrast with black4.78:1WCAG normal text: AA

Greyscale equivalent#343434

Inverted#0DFEFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#675A00no red cones; affects about 1% of men; ΔE 83.6 from the original

Deuteranopia#9B8900no green cones; the most common form, about 1% of men; ΔE 82.5 from the original

Tritanopia#FF000Eno blue cones; rare, and affects men and women equally; ΔE 4.3 from the original

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

Contrast with white, large text4.39:1WCAG large text: AA

Contrast with black, large text4.78:1WCAG large text: AAA

Named colours

Red · ΔE 4.9 Orange red · ΔE 12.3 Tomato · ΔE 28.8 Crimson · ΔE 31.8 Firebrick · ΔE 36 Coral · ΔE 39.6

Nearest named CSS colourRed (#FF0000)ΔE 4.9, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00F1F2

Analogous#F20078, #F27A00

Triadic#00F201, #0100F2

Split complementary#00F27A, #0078F2

Tetradic#78F200, #00F1F2, #7A00F2

Tints, shades & saturation

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

Lighter +40%#FFBFBF

Lighter +30%#FF8C8C

Lighter +20%#FF5A59

Lighter +10%#FF2726

Darker −10%#BF0100

Darker −20%#8C0100

Darker −30%#590000

Darker −40%#260000

More saturated +25%#F20100

Less saturated −25%#D41F1E

Channel breakdown

R242

Red242 (94.9%)

Green1 (0.4%)

Blue0 (0%)

Hue0.25°

Saturation (HSL)100%

Lightness47.45%

Dominant channelRed

Hex per channelR F2 · G 01 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F20100 (chemical formula)

Formula
381,859.8 g/mol
20100 atoms

F20100 has a molar mass of 381,859.8 g/mol, made up of 20100 atoms across 1 element: 20100 × F.

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Molar mass

Molar mass381,859.8 g/mol

Total atoms per molecule20100

Distinct elements1

Mass of one molecule6.3409312 × 10^-19 g

Molecules per gram1.5770554 × 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

F100%

Fluorine (F × 20100)381,859.8 g/mol, 100%

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Elements in this formula

Fluorine

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