Recognised as Colour

#FF6631

#FF6631
Orange
Dark
Nearest: Tomato

#FF6631 is a orange with RGB values 255, 102, 49 and HSL 15°, 100%, 60%. 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

#FF6631#FF6631

HEX#FF6631

RGBrgb(255, 102, 49)

RGB (0–1)1, 0.4, 0.1922

RGB percentages100%, 40%, 19.2%

HSLhsl(15.4, 100%, 59.6%)

HSV / HSBhsv(15.4, 80.8%, 100%)

CMYK0%, 60%, 80.8%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,737,841

CSS custom property--colour: #FF6631;

Brightness & contrast

Relative luminance0.30984WCAG 2.x, 0 is black and 1 is white

Perceived brightness160.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.2:1

Contrast with white2.92:1WCAG normal text: Fail

Contrast with black7.2:1WCAG normal text: AAA

Greyscale equivalent#838383

Inverted#0099CE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#928229no red cones; affects about 1% of men; ΔE 61.4 from the original

Deuteranopia#B7A42Ano green cones; the most common form, about 1% of men; ΔE 62.1 from the original

Tritanopia#FF3F5Cno blue cones; rare, and affects men and women equally; ΔE 32.9 from the original

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

Contrast with white, large text2.92:1WCAG large text: Fail

Contrast with black, large text7.2:1WCAG large text: AAA

Named colours

Tomato · ΔE 11.2 Coral · ΔE 15.2 Orange red · ΔE 17.4 Chocolate · ΔE 19.8 Dark orange · ΔE 27.1 Red · ΔE 27.8

Nearest named CSS colourTomato (#FF6347)ΔE 11.22, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#31CAFF

Analogous#FF3163, #FFCD31

Triadic#31FF66, #6631FF

Split complementary#31FFCD, #3163FF

Tetradic#63FF31, #31CAFF, #CD31FF

Tints, shades & saturation

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

Lighter +40%#FFFEFD

Lighter +30%#FFD8CA

Lighter +20%#FFB297

Lighter +10%#FF8C64

Darker −10%#FD4100

Darker −20%#CA3400

Darker −30%#972700

Darker −40%#641A00

More saturated +25%#FF6631

Less saturated −25%#E5724B

Channel breakdown

R255

G102

B49

Red255 (100%)

Green102 (40%)

Blue49 (19.2%)

Hue15.44°

Saturation (HSL)100%

Lightness59.61%

Dominant channelRed

Hex per channelR FF · G 66 · B 31

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF6631 (chemical formula)

Formula
125,994.736 g/mol
6632 atoms

FF6631 has a molar mass of 125,994.736 g/mol, made up of 6632 atoms across 1 element: 6632 × F.

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Molar mass

Molar mass125,994.736 g/mol

Total atoms per molecule6632

Distinct elements1

Mass of one molecule2.0921918 × 10^-19 g

Molecules per gram4.7796765 × 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 × 6632)125,994.736 g/mol, 100%

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Elements in this formula

Fluorine

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