Recognised as Colour

#FB105C

#FB105C
Red
Dark
Nearest: Crimson

#FB105C is a red with RGB values 251, 16, 92 and HSL 341°, 97%, 52%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FB105C#FB105C

HEX#FB105C

RGBrgb(251, 16, 92)

RGB (0–1)0.9843, 0.0627, 0.3608

RGB percentages98.4%, 6.3%, 36.1%

HSLhsl(340.6, 96.7%, 52.4%)

HSV / HSBhsv(340.6, 93.6%, 98.4%)

CMYK0%, 93.6%, 63.3%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,453,724

CSS custom property--colour: #FB105C;

Brightness & contrast

Relative luminance0.21653WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.33:1

Contrast with white3.94:1WCAG normal text: Fail

Contrast with black5.33:1WCAG normal text: AA

Greyscale equivalent#474747

Inverted#04EFA3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#65635Dno red cones; affects about 1% of men; ΔE 84 from the original

Deuteranopia#9C9056no green cones; the most common form, about 1% of men; ΔE 84.9 from the original

Tritanopia#FF0039no blue cones; rare, and affects men and women equally; ΔE 20.6 from the original

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

Contrast with white, large text3.94:1WCAG large text: AA

Contrast with black, large text5.33:1WCAG large text: AAA

Named colours

Crimson · ΔE 15 Deep pink · ΔE 30.1 Firebrick · ΔE 31.5 Tomato · ΔE 32.9 Brown · ΔE 35.2 Indian red · ΔE 35.5

Nearest named CSS colourCrimson (#DC143C)ΔE 14.98, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#10FBAF

Analogous#FB10D1, #FB3910

Triadic#5CFB10, #105CFB

Split complementary#10FB39, #10D1FB

Tetradic#D2FB10, #10FBAF, #3A10FB

Tints, shades & saturation

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

Lighter +40%#FED9E5

Lighter +30%#FEA6C3

Lighter +20%#FD74A0

Lighter +10%#FC427E

Darker −10%#D40447

Darker −20%#A20336

Darker −30%#700226

Darker −40%#3E0115

More saturated +25%#FF0C5B

Less saturated −25%#DD2E67

Channel breakdown

R251

G16

B92

Red251 (98.4%)

Green16 (6.3%)

Blue92 (36.1%)

Hue340.6°

Saturation (HSL)96.71%

Lightness52.35%

Dominant channelRed

Hex per channelR FB · G 10 · B 5C

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB105C (chemical formula)

Formula
1,166.059 g/mol
107 atoms

FB105C has a molar mass of 1,166.059 g/mol, made up of 107 atoms across 3 elements: 1 × F, 105 × B, 1 × C.

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Molar mass

Molar mass1,166.059 g/mol

Total atoms per molecule107

Distinct elements3

Mass of one molecule1.9362865 × 10^-21 g

Molecules per gram5.1645249 × 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

F1.6%

B97.3%

C1%

Fluorine (F)18.998 g/mol, 1.629%

Boron (B × 105)1,135.05 g/mol, 97.341%

Carbon (C)12.011 g/mol, 1.03%

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