Recognised as Colour

#FB3667

#FB3667
Red
Dark
Nearest: Crimson

#FB3667 is a red with RGB values 251, 54, 103 and HSL 345°, 96%, 60%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FB3667#FB3667

HEX#FB3667

RGBrgb(251, 54, 103)

RGB (0–1)0.9843, 0.2118, 0.4039

RGB percentages98.4%, 21.2%, 40.4%

HSLhsl(345.1, 96.1%, 59.8%)

HSV / HSBhsv(345.1, 78.5%, 98.4%)

CMYK0%, 78.5%, 59%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,463,463

CSS custom property--colour: #FB3667;

Brightness & contrast

Relative luminance0.24127WCAG 2.x, 0 is black and 1 is white

Perceived brightness147.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.83:1

Contrast with white3.6:1WCAG normal text: Fail

Contrast with black5.83:1WCAG normal text: AA

Greyscale equivalent#636363

Inverted#04C998

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F6D68no red cones; affects about 1% of men; ΔE 77.2 from the original

Deuteranopia#A19562no green cones; the most common form, about 1% of men; ΔE 78 from the original

Tritanopia#FF004Bno blue cones; rare, and affects men and women equally; ΔE 15.7 from the original

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

Contrast with white, large text3.6:1WCAG large text: AA

Contrast with black, large text5.83:1WCAG large text: AAA

Named colours

Crimson · ΔE 16.1 Deep pink · ΔE 28.4 Indian red · ΔE 29.5 Firebrick · ΔE 30.2 Tomato · ΔE 31 Salmon · ΔE 32.1

Nearest named CSS colourCrimson (#DC143C)ΔE 16.1, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#36FBCA

Analogous#FB36CA, #FB6736

Triadic#67FB36, #3667FB

Split complementary#36FB67, #36CAFB

Tetradic#CAFB36, #36FBCA, #6736FB

Tints, shades & saturation

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

Lighter +40%#FFFEFE

Lighter +30%#FECCD8

Lighter +20%#FD9AB3

Lighter +10%#FC688D

Darker −10%#F90542

Darker −20%#C70434

Darker −30%#950327

Darker −40%#63021A

More saturated +25%#FF3265

Less saturated −25%#E15074

Channel breakdown

R251

G54

B103

Red251 (98.4%)

Green54 (21.2%)

Blue103 (40.4%)

Hue345.08°

Saturation (HSL)96.1%

Lightness59.8%

Dominant channelRed

Hex per channelR FB · G 36 · B 67

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB3667 (chemical formula)

Formula
39,659.268 g/mol
3668 atoms

FB3667 has a molar mass of 39,659.268 g/mol, made up of 3668 atoms across 2 elements: 1 × F, 3667 × B.

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Molar mass

Molar mass39,659.268 g/mol

Total atoms per molecule3668

Distinct elements2

Mass of one molecule6.5855764 × 10^-20 g

Molecules per gram1.51847 × 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

F0%

B100%

Fluorine (F)18.998 g/mol, 0.048%

Boron (B × 3667)39,640.27 g/mol, 99.952%

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Elements in this formula

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