Recognised as Colour

#B157DB

#B157DB
Violet
Dark
Nearest: Medium orchid

#B157DB is a violet with RGB values 177, 87, 219 and HSL 281°, 65%, 60%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Medium orchid.

Colour values

#B157DB#B157DB

HEX#B157DB

RGBrgb(177, 87, 219)

RGB (0–1)0.6941, 0.3412, 0.8588

RGB percentages69.4%, 34.1%, 85.9%

HSLhsl(280.9, 64.7%, 60%)

HSV / HSBhsv(280.9, 60.3%, 85.9%)

CMYK19.2%, 60.3%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,622,363

CSS custom property--colour: #B157DB;

Brightness & contrast

Relative luminance0.21278WCAG 2.x, 0 is black and 1 is white

Perceived brightness138.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.26:1

Contrast with white4:1WCAG normal text: Fail

Contrast with black5.26:1WCAG normal text: AA

Greyscale equivalent#747474

Inverted#4EA824

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#297ADFno red cones; affects about 1% of men; ΔE 45.8 from the original

Deuteranopia#5181D8no green cones; the most common form, about 1% of men; ΔE 46.9 from the original

Tritanopia#AD6F91no blue cones; rare, and affects men and women equally; ΔE 52.4 from the original

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

Contrast with white, large text4:1WCAG large text: AA

Contrast with black, large text5.26:1WCAG large text: AAA

Named colours

Medium orchid · ΔE 5.5 Dark orchid · ΔE 14.5 Orchid · ΔE 20.7 Medium slateblue · ΔE 20.9 Medium purple · ΔE 21 Violet · ΔE 22.9

Nearest named CSS colourMedium orchid (#BA55D3)ΔE 5.46, clearly different but related

Hue familyviolet

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#81DB57

Analogous#6F57DB, #DB57C3

Triadic#DBB157, #57DBB1

Split complementary#C3DB57, #57DB6F

Tetradic#DB6F57, #81DB57, #57C3DB

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#EBD5F6

Lighter +20%#D8ABED

Lighter +10%#C481E4

Darker −10%#9D2DD2

Darker −20%#7E24A8

Darker −30%#5E1B7E

Darker −40%#3F1254

More saturated +25%#BA3DF4

Less saturated −25%#A871C2

Channel breakdown

R177

G87

B219

Red177 (69.4%)

Green87 (34.1%)

Blue219 (85.9%)

Hue280.91°

Saturation (HSL)64.71%

Lightness60%

Dominant channelBlue

Hex per channelR B1 · G 57 · B DB

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B157Db (chemical formula)

Formula
1,965.17 g/mol
158 atoms

B157Db has a molar mass of 1,965.17 g/mol, made up of 158 atoms across 2 elements: 157 × B, 1 × Db.

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Molar mass

Molar mass1,965.17 g/mol

Total atoms per molecule158

Distinct elements2

Mass of one molecule3.2632416 × 10^-21 g

Molecules per gram3.0644376 × 10^20

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

B86.4%

Db13.6%

Boron (B × 157)1,697.17 g/mol, 86.363%

Dubnium (Db)268 g/mol, 13.637%

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