Recognised as Colour

#FF6646

#FF6646
Red
Dark
Nearest: Tomato

#FF6646 is a red with RGB values 255, 102, 70 and HSL 10°, 100%, 64%. It is a dark colour, so black text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Tomato.

Colour values

#FF6646#FF6646

HEX#FF6646

RGBrgb(255, 102, 70)

RGB (0–1)1, 0.4, 0.2745

RGB percentages100%, 40%, 27.5%

HSLhsl(10.4, 100%, 63.7%)

HSV / HSBhsv(10.4, 72.5%, 100%)

CMYK0%, 60%, 72.5%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,737,862

CSS custom property--colour: #FF6646;

Brightness & contrast

Relative luminance0.31205WCAG 2.x, 0 is black and 1 is white

Perceived brightness161.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.24:1

Contrast with white2.9:1WCAG normal text: Fail

Contrast with black7.24:1WCAG normal text: AAA

Greyscale equivalent#848484

Inverted#0099B9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#908242no red cones; affects about 1% of men; ΔE 61.6 from the original

Deuteranopia#B6A441no green cones; the most common form, about 1% of men; ΔE 62.1 from the original

Tritanopia#FF425Fno blue cones; rare, and affects men and women equally; ΔE 24.9 from the original

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

Contrast with white, large text2.9:1WCAG large text: Fail

Contrast with black, large text7.24:1WCAG large text: AAA

Named colours

Tomato · ΔE 1.8 Coral · ΔE 12.1 Salmon · ΔE 22 Chocolate · ΔE 22.6 Orange red · ΔE 24.8 Crimson · ΔE 25.4

Nearest named CSS colourTomato (#FF6347)ΔE 1.77, below the just-noticeable difference

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#46DFFF

Analogous#FF4683, #FFC346

Triadic#46FF66, #6646FF

Split complementary#46FFC2, #4683FF

Tetradic#82FF46, #46DFFF, #C246FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFE5DF

Lighter +20%#FFBAAC

Lighter +10%#FF9079

Darker −10%#FF3C13

Darker −20%#DF2700

Darker −30%#AC1E00

Darker −40%#791500

More saturated +25%#FF6646

Less saturated −25%#E8755D

Channel breakdown

R255

G102

B70

Red255 (100%)

Green102 (40%)

Blue70 (27.5%)

Hue10.38°

Saturation (HSL)100%

Lightness63.73%

Dominant channelRed

Hex per channelR FF · G 66 · B 46

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF6646 (chemical formula)

Formula
126,279.706 g/mol
6647 atoms

FF6646 has a molar mass of 126,279.706 g/mol, made up of 6647 atoms across 1 element: 6647 × F.

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Molar mass

Molar mass126,279.706 g/mol

Total atoms per molecule6647

Distinct elements1

Mass of one molecule2.0969239 × 10^-19 g

Molecules per gram4.7688904 × 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 × 6647)126,279.706 g/mol, 100%

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Elements in this formula

Fluorine

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