Recognised as Colour

#FF5153

#FF5153
Red
Dark
Nearest: Tomato

#FF5153 is a red with RGB values 255, 81, 83 and HSL 359°, 100%, 66%. 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

#FF5153#FF5153

HEX#FF5153

RGBrgb(255, 81, 83)

RGB (0–1)1, 0.3176, 0.3255

RGB percentages100%, 31.8%, 32.5%

HSLhsl(359.3, 100%, 65.9%)

HSV / HSBhsv(359.3, 68.2%, 100%)

CMYK0%, 68.2%, 67.5%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,732,499

CSS custom property--colour: #FF5153;

Brightness & contrast

Relative luminance0.27769WCAG 2.x, 0 is black and 1 is white

Perceived brightness155.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.55:1

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

Contrast with black6.55:1WCAG normal text: AA

Greyscale equivalent#767676

Inverted#00AEAC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#817851no red cones; affects about 1% of men; ΔE 70.5 from the original

Deuteranopia#AD9D4Eno green cones; the most common form, about 1% of men; ΔE 70.5 from the original

Tritanopia#FF1B54no blue cones; rare, and affects men and women equally; ΔE 16.2 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 text6.55:1WCAG large text: AAA

Named colours

Tomato · ΔE 12.5 Crimson · ΔE 14.1 Firebrick · ΔE 22.7 Salmon · ΔE 23.1 Coral · ΔE 24.1 Indian red · ΔE 26.3

Nearest named CSS colourTomato (#FF6347)ΔE 12.49, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#51FFFD

Analogous#FF51AA, #FFA651

Triadic#53FF51, #5153FF

Split complementary#51FFA6, #51AAFF

Tetradic#AAFF51, #51FFFD, #A651FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFEAEA

Lighter +20%#FFB7B8

Lighter +10%#FF8485

Darker −10%#FF1E21

Darker −20%#EA0003

Darker −30%#B70002

Darker −40%#840002

More saturated +25%#FF5153

Less saturated −25%#E96768

Channel breakdown

R255

G81

B83

Red255 (100%)

Green81 (31.8%)

Blue83 (32.5%)

Hue359.31°

Saturation (HSL)100%

Lightness65.88%

Dominant channelRed

Hex per channelR FF · G 51 · B 53

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

FF5153 (chemical formula)

Formula
97,915.692 g/mol
5154 atoms

FF5153 has a molar mass of 97,915.692 g/mol, made up of 5154 atoms across 1 element: 5154 × F.

Open this reading on its own page →

Molar mass

Molar mass97,915.692 g/mol

Total atoms per molecule5154

Distinct elements1

Mass of one molecule1.6259283 × 10^-19 g

Molecules per gram6.1503326 × 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

F100%

Fluorine (F × 5154)97,915.692 g/mol, 100%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Fluorine

Nerdulate something else

Nothing in mind? Surprise me · today’s page