Recognised as Colour

#F10223

#F10223
Red
Dark
Nearest: Red

#F10223 is a red with RGB values 241, 2, 35 and HSL 352°, 98%, 48%. 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

#F10223#F10223

HEX#F10223

RGBrgb(241, 2, 35)

RGB (0–1)0.9451, 0.0078, 0.1373

RGB percentages94.5%, 0.8%, 13.7%

HSLhsl(351.7, 98.4%, 47.6%)

HSV / HSBhsv(351.7, 99.2%, 94.5%)

CMYK0%, 99.2%, 85.5%, 5.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,794,723

CSS custom property--colour: #F10223;

Brightness & contrast

Relative luminance0.18866WCAG 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 4.77:1

Contrast with white4.4:1WCAG normal text: Fail

Contrast with black4.77:1WCAG normal text: AA

Greyscale equivalent#373737

Inverted#0EFDDC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#655A20no red cones; affects about 1% of men; ΔE 83.2 from the original

Deuteranopia#998812no green cones; the most common form, about 1% of men; ΔE 82.7 from the original

Tritanopia#FF0019no blue cones; rare, and affects men and women equally; ΔE 8.9 from the original

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

Contrast with white, large text4.4:1WCAG large text: AA

Contrast with black, large text4.77:1WCAG large text: AAA

Named colours

Red · ΔE 15.4 Crimson · ΔE 20 Orange red · ΔE 20.3 Tomato · ΔE 23.2 Firebrick · ΔE 28.1 Dark red · ΔE 36.1

Nearest named CSS colourRed (#FF0000)ΔE 15.43, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#02F1D0

Analogous#F1029A, #F15802

Triadic#23F102, #0223F1

Split complementary#02F158, #029AF1

Tetradic#9BF102, #02F1D0, #5902F1

Tints, shades & saturation

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

Lighter +40%#FEC1C9

Lighter +30%#FE8E9D

Lighter +20%#FE5B72

Lighter +10%#FD2946

Darker −10%#BE021C

Darker −20%#8C0114

Darker −30%#59010D

Darker −40%#270006

More saturated +25%#F30022

Less saturated −25%#D32039

Channel breakdown

R241

B35

Red241 (94.5%)

Green2 (0.8%)

Blue35 (13.7%)

Hue351.72°

Saturation (HSL)98.35%

Lightness47.65%

Dominant channelRed

Hex per channelR F1 · G 02 · B 23

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F10223 (chemical formula)

Formula
194,216.554 g/mol
10223 atoms

F10223 has a molar mass of 194,216.554 g/mol, made up of 10223 atoms across 1 element: 10223 × F.

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Molar mass

Molar mass194,216.554 g/mol

Total atoms per molecule10223

Distinct elements1

Mass of one molecule3.2250418 × 10^-19 g

Molecules per gram3.100735 × 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 × 10223)194,216.554 g/mol, 100%

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Elements in this formula

Fluorine

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