Recognised as Colour

#FF3766

#FF3766
Red
Dark
Nearest: Crimson

#FF3766 is a red with RGB values 255, 55, 102 and HSL 346°, 100%, 61%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF3766#FF3766

HEX#FF3766

RGBrgb(255, 55, 102)

RGB (0–1)1, 0.2157, 0.4

RGB percentages100%, 21.6%, 40%

HSLhsl(345.9, 100%, 60.8%)

HSV / HSBhsv(345.9, 78.4%, 100%)

CMYK0%, 78.4%, 60%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,725,862

CSS custom property--colour: #FF3766;

Brightness & contrast

Relative luminance0.24952WCAG 2.x, 0 is black and 1 is white

Perceived brightness149.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.99:1

Contrast with white3.51:1WCAG normal text: Fail

Contrast with black5.99:1WCAG normal text: AA

Greyscale equivalent#656565

Inverted#00C899

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#716F66no red cones; affects about 1% of men; ΔE 78.5 from the original

Deuteranopia#A49861no green cones; the most common form, about 1% of men; ΔE 79.3 from the original

Tritanopia#FF004Cno blue cones; rare, and affects men and women equally; ΔE 13.5 from the original

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

Contrast with white, large text3.51:1WCAG large text: AA

Contrast with black, large text5.99:1WCAG large text: AAA

Named colours

Crimson · ΔE 15.4 Tomato · ΔE 29.8 Deep pink · ΔE 29.9 Firebrick · ΔE 30.1 Indian red · ΔE 30.3 Salmon · ΔE 32.1

Nearest named CSS colourCrimson (#DC143C)ΔE 15.4, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#37FFD0

Analogous#FF37CA, #FF6C37

Triadic#66FF37, #3766FF

Split complementary#37FF6C, #37CAFF

Tetradic#CAFF37, #37FFD0, #6C37FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFD0DB

Lighter +20%#FF9DB4

Lighter +10%#FF6A8D

Darker −10%#FF043F

Darker −20%#D00031

Darker −30%#9D0025

Darker −40%#6A0019

More saturated +25%#FF3766

Less saturated −25%#E65073

Channel breakdown

R255

G55

B102

Red255 (100%)

Green55 (21.6%)

Blue102 (40%)

Hue345.9°

Saturation (HSL)100%

Lightness60.78%

Dominant channelRed

Hex per channelR FF · G 37 · B 66

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF3766 (chemical formula)

Formula
71,565.466 g/mol
3767 atoms

FF3766 has a molar mass of 71,565.466 g/mol, made up of 3767 atoms across 1 element: 3767 × F.

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Molar mass

Molar mass71,565.466 g/mol

Total atoms per molecule3767

Distinct elements1

Mass of one molecule1.1883725 × 10^-19 g

Molecules per gram8.4148698 × 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 × 3767)71,565.466 g/mol, 100%

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Elements in this formula

Fluorine

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