Recognised as Colour

#FB2220

#FB2220
Red
Dark
Nearest: Red

#FB2220 is a red with RGB values 251, 34, 32 and HSL 1°, 96%, 55%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FB2220#FB2220

HEX#FB2220

RGBrgb(251, 34, 32)

RGB (0–1)0.9843, 0.1333, 0.1255

RGB percentages98.4%, 13.3%, 12.5%

HSLhsl(0.5, 96.5%, 55.5%)

HSV / HSBhsv(0.5, 87.3%, 98.4%)

CMYK0%, 86.5%, 87.3%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,458,272

CSS custom property--colour: #FB2220;

Brightness & contrast

Relative luminance0.21758WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.35:1

Contrast with white3.92:1WCAG normal text: Fail

Contrast with black5.35:1WCAG normal text: AA

Greyscale equivalent#505050

Inverted#04DDDF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#70631Bno red cones; affects about 1% of men; ΔE 81.9 from the original

Deuteranopia#A3910Bno green cones; the most common form, about 1% of men; ΔE 82 from the original

Tritanopia#FF0027no blue cones; rare, and affects men and women equally; ΔE 5.7 from the original

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

Contrast with white, large text3.92:1WCAG large text: AA

Contrast with black, large text5.35:1WCAG large text: AAA

Named colours

Red · ΔE 10.9 Orange red · ΔE 14.8 Tomato · ΔE 22.6 Crimson · ΔE 25 Firebrick · ΔE 31.5 Coral · ΔE 34.7

Nearest named CSS colourRed (#FF0000)ΔE 10.92, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#20F9FB

Analogous#FB208C, #FB8F20

Triadic#20FB22, #2220FB

Split complementary#20FB90, #208CFB

Tetradic#8CFB20, #20F9FB, #8F20FB

Tints, shades & saturation

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

Lighter +40%#FFE9E8

Lighter +30%#FEB7B6

Lighter +20%#FD8584

Lighter +10%#FC5452

Darker −10%#E40604

Darker −20%#B20503

Darker −30%#800302

Darker −40%#4E0201

More saturated +25%#FF1E1C

Less saturated −25%#DF3E3C

Channel breakdown

R251

G34

B32

Red251 (98.4%)

Green34 (13.3%)

Blue32 (12.5%)

Hue0.55°

Saturation (HSL)96.48%

Lightness55.49%

Dominant channelRed

Hex per channelR FB · G 22 · B 20

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB2220 (chemical formula)

Formula
24,017.198 g/mol
2221 atoms

FB2220 has a molar mass of 24,017.198 g/mol, made up of 2221 atoms across 2 elements: 1 × F, 2220 × B.

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Molar mass

Molar mass24,017.198 g/mol

Total atoms per molecule2221

Distinct elements2

Mass of one molecule3.9881496 × 10^-20 g

Molecules per gram2.5074285 × 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

F0.1%

B99.9%

Fluorine (F)18.998 g/mol, 0.079%

Boron (B × 2220)23,998.2 g/mol, 99.921%

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Elements in this formula

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