Recognised as Colour

#FF4022

#FF4022
Red
Dark
Nearest: Orange red

#FF4022 is a red with RGB values 255, 64, 34 and HSL 8°, 100%, 57%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF4022#FF4022

HEX#FF4022

RGBrgb(255, 64, 34)

RGB (0–1)1, 0.251, 0.1333

RGB percentages100%, 25.1%, 13.3%

HSLhsl(8.1, 100%, 56.7%)

HSV / HSBhsv(8.1, 86.7%, 100%)

CMYK0%, 74.9%, 86.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,728,098

CSS custom property--colour: #FF4022;

Brightness & contrast

Relative luminance0.25042WCAG 2.x, 0 is black and 1 is white

Perceived brightness148.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.01:1

Contrast with white3.5:1WCAG normal text: Fail

Contrast with black6.01:1WCAG normal text: AA

Greyscale equivalent#666666

Inverted#00BFDD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7C6E1Ano red cones; affects about 1% of men; ΔE 75.9 from the original

Deuteranopia#AB9812no green cones; the most common form, about 1% of men; ΔE 75.8 from the original

Tritanopia#FF003Cno blue cones; rare, and affects men and women equally; ΔE 20.2 from the original

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

Contrast with white, large text3.5:1WCAG large text: AA

Contrast with black, large text6.01:1WCAG large text: AAA

Named colours

Orange red · ΔE 9.9 Red · ΔE 13.6 Tomato · ΔE 18.2 Crimson · ΔE 27.6 Coral · ΔE 28.9 Firebrick · ΔE 31.3

Nearest named CSS colourOrange red (#FF4500)ΔE 9.93, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#22E1FF

Analogous#FF2272, #FFAF22

Triadic#22FF40, #4022FF

Split complementary#22FFAF, #2273FF

Tetradic#73FF22, #22E1FF, #AF22FF

Tints, shades & saturation

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

Lighter +40%#FFF0EE

Lighter +30%#FFC4BB

Lighter +20%#FF9888

Lighter +10%#FF6C55

Darker −10%#EE2000

Darker −20%#BB1900

Darker −30%#881200

Darker −40%#550C00

More saturated +25%#FF4022

Less saturated −25%#E3543E

Channel breakdown

R255

G64

B34

Red255 (100%)

Green64 (25.1%)

Blue34 (13.3%)

Hue8.14°

Saturation (HSL)100%

Lightness56.67%

Dominant channelRed

Hex per channelR FF · G 40 · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF4022 (chemical formula)

Formula
76,428.954 g/mol
4023 atoms

FF4022 has a molar mass of 76,428.954 g/mol, made up of 4023 atoms across 1 element: 4023 × F.

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Molar mass

Molar mass76,428.954 g/mol

Total atoms per molecule4023

Distinct elements1

Mass of one molecule1.2691326 × 10^-19 g

Molecules per gram7.8793971 × 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 × 4023)76,428.954 g/mol, 100%

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Elements in this formula

Fluorine

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