Recognised as Colour

#FF166B

#FF166B
Red
Dark
Nearest: Crimson

#FF166B is a red with RGB values 255, 22, 107 and HSL 338°, 100%, 54%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF166B#FF166B

HEX#FF166B

RGBrgb(255, 22, 107)

RGB (0–1)1, 0.0863, 0.4196

RGB percentages100%, 8.6%, 42%

HSLhsl(338.1, 100%, 54.3%)

HSV / HSBhsv(338.1, 91.4%, 100%)

CMYK0%, 91.4%, 58%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,419

CSS custom property--colour: #FF166B;

Brightness & contrast

Relative luminance0.22895WCAG 2.x, 0 is black and 1 is white

Perceived brightness145 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.58:1

Contrast with white3.76:1WCAG normal text: Fail

Contrast with black5.58:1WCAG normal text: AA

Greyscale equivalent#4E4E4E

Inverted#00E994

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#65676Cno red cones; affects about 1% of men; ΔE 84.3 from the original

Deuteranopia#9E9365no green cones; the most common form, about 1% of men; ΔE 85.1 from the original

Tritanopia#FF0042no blue cones; rare, and affects men and women equally; ΔE 22.8 from the original

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

Contrast with white, large text3.76:1WCAG large text: AA

Contrast with black, large text5.58:1WCAG large text: AAA

Named colours

Crimson · ΔE 21.3 Deep pink · ΔE 22.8 Hot pink · ΔE 34.1 Medium violet red · ΔE 35.2 Firebrick · ΔE 36.5 Indian red · ΔE 37

Nearest named CSS colourCrimson (#DC143C)ΔE 21.32, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#16FFAA

Analogous#FF16E0, #FF3516

Triadic#6BFF16, #166BFF

Split complementary#16FF35, #16E0FF

Tetradic#E0FF16, #16FFAA, #3516FF

Tints, shades & saturation

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

Lighter +40%#FFE2ED

Lighter +30%#FFAFCC

Lighter +20%#FF7CAC

Lighter +10%#FF498B

Darker −10%#E20052

Darker −20%#AF0040

Darker −30%#7C002D

Darker −40%#49001B

More saturated +25%#FF166B

Less saturated −25%#E23373

Channel breakdown

R255

G22

B107

Red255 (100%)

Green22 (8.6%)

Blue107 (42%)

Hue338.11°

Saturation (HSL)100%

Lightness54.31%

Dominant channelRed

Hex per channelR FF · G 16 · B 6B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF166B (chemical formula)

Formula
3,183.476 g/mol
168 atoms

FF166B has a molar mass of 3,183.476 g/mol, made up of 168 atoms across 2 elements: 167 × F, 1 × B.

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Molar mass

Molar mass3,183.476 g/mol

Total atoms per molecule168

Distinct elements2

Mass of one molecule5.2862863 × 10^-21 g

Molecules per gram1.8916872 × 10^20

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

F99.7%

B0.3%

Fluorine (F × 167)3,172.666 g/mol, 99.66%

Boron (B)10.81 g/mol, 0.34%

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