Recognised as Colour

#FB385B

#FB385B
Red
Dark
Nearest: Crimson

#FB385B is a red with RGB values 251, 56, 91 and HSL 349°, 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

#FB385B#FB385B

HEX#FB385B

RGBrgb(251, 56, 91)

RGB (0–1)0.9843, 0.2196, 0.3569

RGB percentages98.4%, 22%, 35.7%

HSLhsl(349.2, 96.1%, 60.2%)

HSV / HSBhsv(349.2, 77.7%, 98.4%)

CMYK0%, 77.7%, 63.7%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,463,963

CSS custom property--colour: #FB385B;

Brightness & contrast

Relative luminance0.24093WCAG 2.x, 0 is black and 1 is white

Perceived brightness147 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.82:1

Contrast with white3.61:1WCAG normal text: Fail

Contrast with black5.82:1WCAG normal text: AA

Greyscale equivalent#646464

Inverted#04C7A4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726D5Bno red cones; affects about 1% of men; ΔE 76.9 from the original

Deuteranopia#A39555no green cones; the most common form, about 1% of men; ΔE 77.3 from the original

Tritanopia#FF0047no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original

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

Contrast with white, large text3.61:1WCAG large text: AA

Contrast with black, large text5.82:1WCAG large text: AAA

Named colours

Crimson · ΔE 11 Tomato · ΔE 24.7 Firebrick · ΔE 26 Indian red · ΔE 28.8 Salmon · ΔE 29.9 Brown · ΔE 29.9

Nearest named CSS colourCrimson (#DC143C)ΔE 11, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#38FBD8

Analogous#FB38BC, #FB7638

Triadic#5BFB38, #385BFB

Split complementary#38FB76, #38BCFB

Tetradic#BDFB38, #38FBD8, #7738FB

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FECED7

Lighter +20%#FD9CAD

Lighter +10%#FC6A84

Darker −10%#FA0632

Darker −20%#C90427

Darker −30%#97031E

Darker −40%#650214

More saturated +25%#FF3458

Less saturated −25%#E2516B

Channel breakdown

R251

G56

B91

Red251 (98.4%)

Green56 (22%)

Blue91 (35.7%)

Hue349.23°

Saturation (HSL)96.06%

Lightness60.2%

Dominant channelRed

Hex per channelR FB · G 38 · B 5B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB385B (chemical formula)

Formula
4,191.658 g/mol
387 atoms

FB385B has a molar mass of 4,191.658 g/mol, made up of 387 atoms across 2 elements: 1 × F, 386 × B.

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Molar mass

Molar mass4,191.658 g/mol

Total atoms per molecule387

Distinct elements2

Mass of one molecule6.9604119 × 10^-21 g

Molecules per gram1.4366966 × 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

F0.5%

B99.5%

Fluorine (F)18.998 g/mol, 0.453%

Boron (B × 386)4,172.66 g/mol, 99.547%

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Elements in this formula

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