Recognised as Colour

#FE2121

#FE2121
Red
Dark
Nearest: Red

#FE2121 is a red with RGB values 254, 33, 33 and HSL 0°, 99%, 56%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FE2121#FE2121

HEX#FE2121

RGBrgb(254, 33, 33)

RGB (0–1)0.9961, 0.1294, 0.1294

RGB percentages99.6%, 12.9%, 12.9%

HSLhsl(0, 99.1%, 56.3%)

HSV / HSBhsv(0, 87%, 99.6%)

CMYK0%, 87%, 87%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,654,625

CSS custom property--colour: #FE2121;

Brightness & contrast

Relative luminance0.22268WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.45:1

Contrast with white3.85:1WCAG normal text: Fail

Contrast with black5.45:1WCAG normal text: AA

Greyscale equivalent#505050

Inverted#01DEDE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#71641Cno red cones; affects about 1% of men; ΔE 83 from the original

Deuteranopia#A4920Cno green cones; the most common form, about 1% of men; ΔE 83 from the original

Tritanopia#FF0026no blue cones; rare, and affects men and women equally; ΔE 4.8 from the original

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

Contrast with white, large text3.85:1WCAG large text: AA

Contrast with black, large text5.45:1WCAG large text: AAA

Named colours

Red · ΔE 10.4 Orange red · ΔE 15 Tomato · ΔE 23.3 Crimson · ΔE 25.6 Firebrick · ΔE 32.5 Coral · ΔE 35.4

Nearest named CSS colourRed (#FF0000)ΔE 10.4, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21FEFE

Analogous#FE2190, #FE9021

Triadic#21FE21, #2121FE

Split complementary#21FE90, #2190FE

Tetradic#90FE21, #21FEFE, #9021FE

Tints, shades & saturation

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

Lighter +40%#FFECEC

Lighter +30%#FFB9B9

Lighter +20%#FE8787

Lighter +10%#FE5454

Darker −10%#EB0101

Darker −20%#B80101

Darker −30%#850101

Darker −40%#530000

More saturated +25%#FF2020

Less saturated −25%#E23D3D

Channel breakdown

R254

G33

B33

Red254 (99.6%)

Green33 (12.9%)

Blue33 (12.9%)

Hue0°

Saturation (HSL)99.1%

Lightness56.27%

Dominant channelRed

Hex per channelR FE · G 21 · B 21

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe2121 (chemical formula)

Formula
118,447.245 g/mol
2121 atoms

Fe2121 has a molar mass of 118,447.245 g/mol, made up of 2121 atoms across 1 element: 2121 × Fe.

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Molar mass

Molar mass118,447.245 g/mol

Total atoms per molecule2121

Distinct elements1

Mass of one molecule1.9668628 × 10^-19 g

Molecules per gram5.0842388 × 10^18

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

Fe100%

Iron (Fe × 2121)118,447.245 g/mol, 100%

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Elements in this formula

Iron

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