Recognised as Colour

#FE5533

#FE5533
Red
Dark
Nearest: Tomato

#FE5533 is a red with RGB values 254, 85, 51 and HSL 10°, 99%, 60%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FE5533#FE5533

HEX#FE5533

RGBrgb(254, 85, 51)

RGB (0–1)0.9961, 0.3333, 0.2

RGB percentages99.6%, 33.3%, 20%

HSLhsl(10, 99%, 59.8%)

HSV / HSBhsv(10, 79.9%, 99.6%)

CMYK0%, 66.5%, 79.9%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,667,955

CSS custom property--colour: #FE5533;

Brightness & contrast

Relative luminance0.27807WCAG 2.x, 0 is black and 1 is white

Perceived brightness154.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.56:1

Contrast with white3.2:1WCAG normal text: Fail

Contrast with black6.56:1WCAG normal text: AA

Greyscale equivalent#767676

Inverted#01AACC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#86782Dno red cones; affects about 1% of men; ΔE 68.3 from the original

Deuteranopia#B09E2Bno green cones; the most common form, about 1% of men; ΔE 68.8 from the original

Tritanopia#FF1C4Fno blue cones; rare, and affects men and women equally; ΔE 27 from the original

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

Contrast with white, large text3.2:1WCAG large text: AA

Contrast with black, large text6.56:1WCAG large text: AAA

Named colours

Tomato · ΔE 9.1 Orange red · ΔE 16.2 Coral · ΔE 19.8 Red · ΔE 23 Crimson · ΔE 25.3 Chocolate · ΔE 25.9

Nearest named CSS colourTomato (#FF6347)ΔE 9.11, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#33DCFE

Analogous#FE3376, #FEBA33

Triadic#33FE55, #5533FE

Split complementary#33FEBB, #3376FE

Tetradic#77FE33, #33DCFE, #BB33FE

Tints, shades & saturation

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

Lighter +40%#FFFEFE

Lighter +30%#FFD4CB

Lighter +20%#FEAA99

Lighter +10%#FE7F66

Darker −10%#FD2B01

Darker −20%#CA2301

Darker −30%#971A01

Darker −40%#651100

More saturated +25%#FF5432

Less saturated −25%#E4664D

Channel breakdown

R254

G85

B51

Red254 (99.6%)

Green85 (33.3%)

Blue51 (20%)

Hue10.05°

Saturation (HSL)99.02%

Lightness59.8%

Dominant channelRed

Hex per channelR FE · G 55 · B 33

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe5533 (chemical formula)

Formula
308,990.385 g/mol
5533 atoms

Fe5533 has a molar mass of 308,990.385 g/mol, made up of 5533 atoms across 1 element: 5533 × Fe.

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Molar mass

Molar mass308,990.385 g/mol

Total atoms per molecule5533

Distinct elements1

Mass of one molecule5.1309061 × 10^-19 g

Molecules per gram1.9489735 × 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 × 5533)308,990.385 g/mol, 100%

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Elements in this formula

Iron

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