Recognised as Colour

#F23110

#F23110
Red
Dark
Nearest: Orange red

#F23110 is a red with RGB values 242, 49, 16 and HSL 9°, 90%, 51%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#F23110#F23110

HEX#F23110

RGBrgb(242, 49, 16)

RGB (0–1)0.949, 0.1922, 0.0627

RGB percentages94.9%, 19.2%, 6.3%

HSLhsl(8.8, 89.7%, 50.6%)

HSV / HSBhsv(8.8, 93.4%, 94.9%)

CMYK0%, 79.8%, 93.4%, 5.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,872,272

CSS custom property--colour: #F23110;

Brightness & contrast

Relative luminance0.21111WCAG 2.x, 0 is black and 1 is white

Perceived brightness137.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.22:1

Contrast with white4.02:1WCAG normal text: Fail

Contrast with black5.22:1WCAG normal text: AA

Greyscale equivalent#585858

Inverted#0DCEEF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#716402no red cones; affects about 1% of men; ΔE 76.4 from the original

Deuteranopia#A08E00no green cones; the most common form, about 1% of men; ΔE 75.9 from the original

Tritanopia#FF002Eno blue cones; rare, and affects men and women equally; ΔE 15.5 from the original

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

Contrast with white, large text4.02:1WCAG large text: AA

Contrast with black, large text5.22:1WCAG large text: AAA

Named colours

Orange red · ΔE 8.8 Red · ΔE 11.5 Tomato · ΔE 21.5 Crimson · ΔE 28.7 Firebrick · ΔE 31.2 Coral · ΔE 31.8

Nearest named CSS colourOrange red (#FF4500)ΔE 8.83, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#10D1F2

Analogous#F21060, #F2A210

Triadic#10F231, #3110F2

Split complementary#10F2A2, #1060F2

Tetradic#60F210, #10D1F2, #A210F2

Tints, shades & saturation

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

Lighter +40%#FDD8D1

Lighter +30%#FAAEA1

Lighter +20%#F78471

Lighter +10%#F55B40

Darker −10%#C4260B

Darker −20%#941C08

Darker −30%#641305

Darker −40%#330A03

More saturated +25%#FF2803

Less saturated −25%#D34730

Channel breakdown

R242

G49

B16

Red242 (94.9%)

Green49 (19.2%)

Blue16 (6.3%)

Hue8.76°

Saturation (HSL)89.68%

Lightness50.59%

Dominant channelRed

Hex per channelR F2 · G 31 · B 10

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F23110 (chemical formula)

Formula
439,043.78 g/mol
23110 atoms

F23110 has a molar mass of 439,043.78 g/mol, made up of 23110 atoms across 1 element: 23110 × F.

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Molar mass

Molar mass439,043.78 g/mol

Total atoms per molecule23110

Distinct elements1

Mass of one molecule7.2904935 × 10^-19 g

Molecules per gram1.3716493 × 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 × 23110)439,043.78 g/mol, 100%

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Elements in this formula

Fluorine

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