Recognised as Colour

#FF1722

#FF1722
Red
Dark
Nearest: Red

#FF1722 is a red with RGB values 255, 23, 34 and HSL 357°, 100%, 55%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF1722#FF1722

HEX#FF1722

RGBrgb(255, 23, 34)

RGB (0–1)1, 0.0902, 0.1333

RGB percentages100%, 9%, 13.3%

HSLhsl(357.2, 100%, 54.5%)

HSV / HSBhsv(357.2, 91%, 100%)

CMYK0%, 91%, 86.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,602

CSS custom property--colour: #FF1722;

Brightness & contrast

Relative luminance0.21988WCAG 2.x, 0 is black and 1 is white

Perceived brightness141 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.4:1

Contrast with white3.89:1WCAG normal text: Fail

Contrast with black5.4:1WCAG normal text: AA

Greyscale equivalent#494949

Inverted#00E8DD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F621Dno red cones; affects about 1% of men; ΔE 84.6 from the original

Deuteranopia#A4920Dno green cones; the most common form, about 1% of men; ΔE 84.8 from the original

Tritanopia#FF0021no blue cones; rare, and affects men and women equally; ΔE 2 from the original

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

Contrast with white, large text3.89:1WCAG large text: AA

Contrast with black, large text5.4:1WCAG large text: AAA

Named colours

Red · ΔE 10.5 Orange red · ΔE 16.6 Tomato · ΔE 24.5 Crimson · ΔE 25.4 Firebrick · ΔE 33.2 Coral · ΔE 36.9

Nearest named CSS colourRed (#FF0000)ΔE 10.55, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17FFF4

Analogous#FF1796, #FF8017

Triadic#22FF17, #1722FF

Split complementary#17FF80, #1796FF

Tetradic#96FF17, #17FFF4, #8017FF

Tints, shades & saturation

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

Lighter +40%#FFE3E4

Lighter +30%#FFB0B4

Lighter +20%#FF7D83

Lighter +10%#FF4A53

Darker −10%#E3000B

Darker −20%#B00008

Darker −30%#7D0006

Darker −40%#4A0004

More saturated +25%#FF1722

Less saturated −25%#E2343C

Channel breakdown

R255

G23

B34

Red255 (100%)

Green23 (9%)

Blue34 (13.3%)

Hue357.16°

Saturation (HSL)100%

Lightness54.51%

Dominant channelRed

Hex per channelR FF · G 17 · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF1722 (chemical formula)

Formula
32,733.554 g/mol
1723 atoms

FF1722 has a molar mass of 32,733.554 g/mol, made up of 1723 atoms across 1 element: 1723 × F.

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Molar mass

Molar mass32,733.554 g/mol

Total atoms per molecule1723

Distinct elements1

Mass of one molecule5.4355345 × 10^-20 g

Molecules per gram1.8397455 × 10^19

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 × 1723)32,733.554 g/mol, 100%

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Elements in this formula

Fluorine

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