Recognised as Colour

#FF1756

#FF1756
Red
Dark
Nearest: Crimson

#FF1756 is a red with RGB values 255, 23, 86 and HSL 344°, 100%, 55%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF1756#FF1756

HEX#FF1756

RGBrgb(255, 23, 86)

RGB (0–1)1, 0.0902, 0.3373

RGB percentages100%, 9%, 33.7%

HSLhsl(343.7, 100%, 54.5%)

HSV / HSBhsv(343.7, 91%, 100%)

CMYK0%, 91%, 66.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,654

CSS custom property--colour: #FF1756;

Brightness & contrast

Relative luminance0.22545WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.51:1

Contrast with white3.81:1WCAG normal text: Fail

Contrast with black5.51:1WCAG normal text: AA

Greyscale equivalent#4D4D4D

Inverted#00E8A9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#696556no red cones; affects about 1% of men; ΔE 84.6 from the original

Deuteranopia#A0934Fno green cones; the most common form, about 1% of men; ΔE 85.4 from the original

Tritanopia#FF0038no blue cones; rare, and affects men and women equally; ΔE 16.3 from the original

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

Contrast with white, large text3.81:1WCAG large text: AA

Contrast with black, large text5.51:1WCAG large text: AAA

Named colours

Crimson · ΔE 12.8 Tomato · ΔE 29.4 Firebrick · ΔE 30.1 Deep pink · ΔE 34.9 Brown · ΔE 35 Indian red · ΔE 36

Nearest named CSS colourCrimson (#DC143C)ΔE 12.84, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17FFC0

Analogous#FF17CA, #FF4C17

Triadic#56FF17, #1756FF

Split complementary#17FF4C, #17CAFF

Tetradic#CAFF17, #17FFC0, #4C17FF

Tints, shades & saturation

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

Lighter +40%#FFE3EB

Lighter +30%#FFB0C5

Lighter +20%#FF7DA0

Lighter +10%#FF4A7B

Darker −10%#E3003E

Darker −20%#B00030

Darker −30%#7D0022

Darker −40%#4A0014

More saturated +25%#FF1756

Less saturated −25%#E23463

Channel breakdown

R255

G23

B86

Red255 (100%)

Green23 (9%)

Blue86 (33.7%)

Hue343.71°

Saturation (HSL)100%

Lightness54.51%

Dominant channelRed

Hex per channelR FF · G 17 · B 56

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF1756 (chemical formula)

Formula
33,379.486 g/mol
1757 atoms

FF1756 has a molar mass of 33,379.486 g/mol, made up of 1757 atoms across 1 element: 1757 × F.

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Molar mass

Molar mass33,379.486 g/mol

Total atoms per molecule1757

Distinct elements1

Mass of one molecule5.5427941 × 10^-20 g

Molecules per gram1.8041442 × 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 × 1757)33,379.486 g/mol, 100%

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Elements in this formula

Fluorine

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