Recognised as Colour

#AC7557

#AC7557
Orange
Dark
Nearest: Sienna

#AC7557 is a orange with RGB values 172, 117, 87 and HSL 21°, 34%, 51%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#AC7557#AC7557

HEX#AC7557

RGBrgb(172, 117, 87)

RGB (0–1)0.6745, 0.4588, 0.3412

RGB percentages67.5%, 45.9%, 34.1%

HSLhsl(21.2, 33.9%, 50.8%)

HSV / HSBhsv(21.2, 49.4%, 67.5%)

CMYK0%, 32%, 49.4%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,302,231

CSS custom property--colour: #AC7557;

Brightness & contrast

Relative luminance0.22181WCAG 2.x, 0 is black and 1 is white

Perceived brightness133.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.44:1

Contrast with white3.86:1WCAG normal text: Fail

Contrast with black5.44:1WCAG normal text: AA

Greyscale equivalent#7F7F7F

Inverted#538AA8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#847B55no red cones; affects about 1% of men; ΔE 21.2 from the original

Deuteranopia#918657no green cones; the most common form, about 1% of men; ΔE 21.3 from the original

Tritanopia#B96B6Dno blue cones; rare, and affects men and women equally; ΔE 18.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.86:1WCAG large text: AA

Contrast with black, large text5.44:1WCAG large text: AAA

Named colours

Sienna · ΔE 18.5 Dark salmon · ΔE 18.8 Rosy brown · ΔE 20.9 Peru · ΔE 24.1 Saddle brown · ΔE 24.5 Tan · ΔE 24.5

Nearest named CSS colourSienna (#A0522D)ΔE 18.51, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#578EAC

Analogous#AC5763, #ACA057

Triadic#57AC75, #7557AC

Split complementary#57AC9F, #5764AC

Tetradic#63AC57, #578EAC, #A057AC

Tints, shades & saturation

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

Lighter +40%#EFE5E0

Lighter +30%#DFC9BD

Lighter +20%#CEAD9B

Lighter +10%#BD9179

Darker −10%#8B5E45

Darker −20%#694734

Darker −30%#473023

Darker −40%#251912

More saturated +25%#CB6C38

Less saturated −25%#8D7E76

Channel breakdown

R172

G117

B87

Red172 (67.5%)

Green117 (45.9%)

Blue87 (34.1%)

Hue21.18°

Saturation (HSL)33.86%

Lightness50.78%

Dominant channelRed

Hex per channelR AC · G 75 · B 57

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac7557 (chemical formula)

Formula
1,715,439 g/mol
7557 atoms

Ac7557 has a molar mass of 1,715,439 g/mol, made up of 7557 atoms across 1 element: 7557 × Ac.

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Molar mass

Molar mass1,715,439 g/mol

Total atoms per molecule7557

Distinct elements1

Mass of one molecule2.8485535 × 10^-18 g

Molecules per gram3.5105537 × 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 × 7557)1,715,439 g/mol, 100%

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Elements in this formula

Actinium

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