Recognised as Colour

#AC3300

#AC3300
Orange
Dark
Nearest: Dark red

#AC3300 is a orange with RGB values 172, 51, 0 and HSL 18°, 100%, 34%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dark red.

Colour values

#AC3300#AC3300

HEX#AC3300

RGBrgb(172, 51, 0)

RGB (0–1)0.6745, 0.2, 0

RGB percentages67.5%, 20%, 0%

HSLhsl(17.8, 100%, 33.7%)

HSV / HSBhsv(17.8, 100%, 67.5%)

CMYK0%, 70.3%, 100%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,285,248

CSS custom property--colour: #AC3300;

Brightness & contrast

Relative luminance0.11138WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.51:1

Contrast with white6.51:1WCAG normal text: AA

Contrast with black3.23:1WCAG normal text: Fail

Greyscale equivalent#494949

Inverted#53CCFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#584D00no red cones; affects about 1% of men; ΔE 52.6 from the original

Deuteranopia#766800no green cones; the most common form, about 1% of men; ΔE 52.1 from the original

Tritanopia#BE002Cno blue cones; rare, and affects men and women equally; ΔE 25.4 from the original

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

Contrast with white, large text6.51:1WCAG large text: AAA

Contrast with black, large text3.23:1WCAG large text: AA

Named colours

Dark red · ΔE 16.1 Firebrick · ΔE 16.5 Maroon · ΔE 19.8 Chocolate · ΔE 19.9 Brown · ΔE 21.5 Saddle brown · ΔE 23.9

Nearest named CSS colourDark red (#8B0000)ΔE 16.13, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0079AC

Analogous#AC0023, #AC8900

Triadic#00AC33, #3300AC

Split complementary#00AC89, #0023AC

Tetradic#23AC00, #0079AC, #8900AC

Tints, shades & saturation

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

Lighter +40%#FFA179

Lighter +30%#FF7D46

Lighter +20%#FF5913

Lighter +10%#DF4200

Darker −10%#792400

Darker −20%#461500

Darker −30%#130600

Darker −40%#000000

More saturated +25%#AC3300

Less saturated −25%#973C16

Channel breakdown

R172

G51

Red172 (67.5%)

Green51 (20%)

Blue0 (0%)

Hue17.79°

Saturation (HSL)100%

Lightness33.73%

Dominant channelRed

Hex per channelR AC · G 33 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac3300 (chemical formula)

Formula
749,100 g/mol
3300 atoms

Ac3300 has a molar mass of 749,100 g/mol, made up of 3300 atoms across 1 element: 3300 × Ac.

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Molar mass

Molar mass749,100 g/mol

Total atoms per molecule3300

Distinct elements1

Mass of one molecule1.2439098 × 10^-18 g

Molecules per gram8.039168 × 10^17

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

Ac100%

Actinium (Ac × 3300)749,100 g/mol, 100%

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Elements in this formula

Actinium

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