Recognised as Colour

#FF4B22

#FF4B22
Red
Dark
Nearest: Orange red

#FF4B22 is a red with RGB values 255, 75, 34 and HSL 11°, 100%, 57%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF4B22#FF4B22

HEX#FF4B22

RGBrgb(255, 75, 34)

RGB (0–1)1, 0.2941, 0.1333

RGB percentages100%, 29.4%, 13.3%

HSLhsl(11.1, 100%, 56.7%)

HSV / HSBhsv(11.1, 86.7%, 100%)

CMYK0%, 70.6%, 86.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,730,914

CSS custom property--colour: #FF4B22;

Brightness & contrast

Relative luminance0.26408WCAG 2.x, 0 is black and 1 is white

Perceived brightness151.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.28:1

Contrast with white3.34:1WCAG normal text: Fail

Contrast with black6.28:1WCAG normal text: AA

Greyscale equivalent#6E6E6E

Inverted#00B4DD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#827319no red cones; affects about 1% of men; ΔE 72.1 from the original

Deuteranopia#AE9B13no green cones; the most common form, about 1% of men; ΔE 72.4 from the original

Tritanopia#FF0044no blue cones; rare, and affects men and women equally; ΔE 27 from the original

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

Contrast with white, large text3.34:1WCAG large text: AA

Contrast with black, large text6.28:1WCAG large text: AAA

Named colours

Orange red · ΔE 8.9 Red · ΔE 16.4 Tomato · ΔE 16.6 Coral · ΔE 25.9 Crimson · ΔE 29.4 Chocolate · ΔE 29.4

Nearest named CSS colourOrange red (#FF4500)ΔE 8.9, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#22D6FF

Analogous#FF2267, #FFBA22

Triadic#22FF4B, #4B22FF

Split complementary#22FFBA, #2267FF

Tetradic#68FF22, #22D6FF, #BA22FF

Tints, shades & saturation

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

Lighter +40%#FFF1EE

Lighter +30%#FFC8BB

Lighter +20%#FF9E88

Lighter +10%#FF7555

Darker −10%#EE2C00

Darker −20%#BB2300

Darker −30%#881900

Darker −40%#551000

More saturated +25%#FF4B22

Less saturated −25%#E35C3E

Channel breakdown

R255

G75

B34

Red255 (100%)

Green75 (29.4%)

Blue34 (13.3%)

Hue11.13°

Saturation (HSL)100%

Lightness56.67%

Dominant channelRed

Hex per channelR FF · G 4B · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF4B22 (chemical formula)

Formula
332.81 g/mol
27 atoms

FF4B22 has a molar mass of 332.81 g/mol, made up of 27 atoms across 2 elements: 5 × F, 22 × B.

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Molar mass

Molar mass332.81 g/mol

Total atoms per molecule27

Distinct elements2

Mass of one molecule5.5264401 × 10^-22 g

Molecules per gram1.8094831 × 10^21

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

F28.5%

B71.5%

Fluorine (F × 5)94.99 g/mol, 28.542%

Boron (B × 22)237.82 g/mol, 71.458%

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