#A666EB Color

#A666EB is rgb(166, 102, 235) in RGB, hsl(269, 77%, 66%) in HSL, and about cmyk(29%, 57%, 0%, 8%) in CMYK. It has no registered color name of its own — the closest is Lavender Indigo (#9457EB), visibly different at ΔE 10.11. Black text is the more readable choice on this background.

#A666EB

HEX#A666EB

RGBrgb(166, 102, 235)

HSLhsl(269, 77%, 66%)

HSVhsv(269, 57%, 92%)

CMYKcmyk(29%, 57%, 0%, 8%)

OKLCHoklch(64% 0.196 303.5)

LABlab(55.12% 45.41 -58.37)

LCHlch(55.12% 73.95 307.88)

What #A666EB Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #A666EB, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Lavender Indigo#9457EBΔE 10.11 Medium Slate Blue#7B68EEΔE 14.64 Medium Orchid#BA55D3ΔE 14.65 Rich Lilac#B666D2ΔE 15.49 Medium Purple#9370DBΔE 15.75 Amethyst#9966CCΔE 16.04

Browse the full index of named colors A-Z or every purple in the library.

#A666EB Channel Values

How #A666EB breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 166 · G 102 · B 235	8-bit channels as sent to the display
HSL	H 269° · S 77% · L 66%	Easiest model for building lighter and darker variants
HSV	H 269° · S 57% · V 92%	Matches the picker in most design tools
CMYK	C 29% · M 57% · Y 0% · K 8%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	3.67:1 vs white · 5.72:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #A666EB background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

Fails AAWhite text3.67:1AA normal AA large AAA normal

TextBlack text5.72:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #A666EB in the contrast checker.

Colors That Go With #A666EB

Pairings derived from color-wheel relationships. The complementary color sits opposite #A666EB; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #A666EB

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #A666EB.

How #A666EB Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#A666EB

Protanopia#7474EB

Protanomaly#8B6FEB

Deuteranopia#8080EA

Deuteranomaly#9176EA

Tritanopia#938181

Tritanomaly#9B77B5

Achromatopsia#858585

Test a full palette in the color blindness simulator.

Using #A666EB in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-a666eb: #A666EB;

CSS backgroundbackground-color: #A666EB;

Tailwind configcolors: { 'color-a666eb': '#A666EB' }

SwiftUIColor(red: 0.651, green: 0.400, blue: 0.922)

Android XML<color name="color_a666eb">#A666EB</color>

SVG fillfill="#A666EB"

More Purple Colors

#A666EB sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024 fdf8ff 170b22 fdf4ff 1b0d35 faf5ff 1d0731 fae8ff 1e0033 f6cfff 20002e f3e8ff 300052 402060 541490 6600cc 7008e7 8806ce 9900cc a11fff b19cd9 c27aff cebeef e0b2eb

#A666EB Frequently Asked Questions

What color is #A666EB?

#A666EB is a light purple — rgb(166, 102, 235) in RGB and hsl(269, 77%, 66%) in HSL. It carries no registered color name of its own; the closest named color is Lavender Indigo (#9457EB), which is visibly different at a CIE76 distance of 10.11.

What is the RGB value of #A666EB?

#A666EB is rgb(166, 102, 235) — red 166, green 102, and blue 235 on the 0-255 scale.

What is the CMYK value of #A666EB?

#A666EB converts to approximately cmyk(29%, 57%, 0%, 8%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #A666EB be black or white?

Black text is the more readable choice. #A666EB scores 3.67:1 against white and 5.72:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #A666EB as a CSS color keyword?

No. #A666EB is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is mediumslateblue (#7B68EE) at a CIE76 distance of 14.64, which is visibly different.

Open #A666EB in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every purple in the color library, the guide to shades of purple, or the full color library.