Recognised as Colour

#FF1727

#FF1727
Red
Dark
Nearest: Red

#FF1727 is a red with RGB values 255, 23, 39 and HSL 356°, 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

#FF1727#FF1727

HEX#FF1727

RGBrgb(255, 23, 39)

RGB (0–1)1, 0.0902, 0.1529

RGB percentages100%, 9%, 15.3%

HSLhsl(355.9, 100%, 54.5%)

HSV / HSBhsv(355.9, 91%, 100%)

CMYK0%, 91%, 84.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,607

CSS custom property--colour: #FF1727;

Brightness & contrast

Relative luminance0.22019WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.2 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#00E8D8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6223no red cones; affects about 1% of men; ΔE 84.9 from the original

Deuteranopia#A49216no green cones; the most common form, about 1% of men; ΔE 84.7 from the original

Tritanopia#FF0023no blue cones; rare, and affects men and women equally; ΔE 2.4 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 12.8 Orange red · ΔE 18.4 Crimson · ΔE 23.4 Tomato · ΔE 23.7 Firebrick · ΔE 32 Coral · ΔE 36.5

Nearest named CSS colourRed (#FF0000)ΔE 12.81, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17FFEF

Analogous#FF179B, #FF7B17

Triadic#27FF17, #1727FF

Split complementary#17FF7B, #179BFF

Tetradic#9BFF17, #17FFEF, #7B17FF

Tints, shades & saturation

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

Lighter +40%#FFE3E5

Lighter +30%#FFB0B5

Lighter +20%#FF7D86

Lighter +10%#FF4A56

Darker −10%#E30010

Darker −20%#B0000C

Darker −30%#7D0009

Darker −40%#4A0005

More saturated +25%#FF1727

Less saturated −25%#E23440

Channel breakdown

R255

G23

B39

Red255 (100%)

Green23 (9%)

Blue39 (15.3%)

Hue355.86°

Saturation (HSL)100%

Lightness54.51%

Dominant channelRed

Hex per channelR FF · G 17 · B 27

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF1727 (chemical formula)

Formula
32,828.544 g/mol
1728 atoms

FF1727 has a molar mass of 32,828.544 g/mol, made up of 1728 atoms across 1 element: 1728 × F.

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Molar mass

Molar mass32,828.544 g/mol

Total atoms per molecule1728

Distinct elements1

Mass of one molecule5.451308 × 10^-20 g

Molecules per gram1.8344221 × 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 × 1728)32,828.544 g/mol, 100%

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Elements in this formula

Fluorine

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