#A666E5 Color

#A666E5 is rgb(166, 102, 229) in RGB, hsl(270, 71%, 65%) in HSL, and about cmyk(28%, 55%, 0%, 10%) in CMYK. It has no registered color name of its own — the closest is Rich Lilac (#B666D2), visibly different at ΔE 12.71. Black text is the more readable choice on this background.

#A666E5

HEX#A666E5

RGBrgb(166, 102, 229)

HSLhsl(270, 71%, 65%)

HSVhsv(270, 55%, 90%)

CMYKcmyk(28%, 55%, 0%, 10%)

OKLCHoklch(63.6% 0.189 304.9)

LABlab(54.82% 44.31 -55.49)

LCHlch(54.82% 71.01 308.61)

What #A666E5 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 #A666E5, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Rich Lilac#B666D2ΔE 12.71 Lavender Indigo#9457EBΔE 12.76 Amethyst#9966CCΔE 13.1 Medium Orchid#BA55D3ΔE 13.47 Medium Purple#9370DBΔE 13.51 Rich Lavender#A76BCFΔE 14.08

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

#A666E5 Channel Values

How #A666E5 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 229	8-bit channels as sent to the display
HSL	H 270° · S 71% · L 65%	Easiest model for building lighter and darker variants
HSV	H 270° · S 55% · V 90%	Matches the picker in most design tools
CMYK	C 28% · M 55% · Y 0% · K 10%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	3.71:1 vs white · 5.65:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #A666E5 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 text3.71:1AA normal AA large AAA normal

TextBlack text5.65:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #A666E5 in the contrast checker.

Colors That Go With #A666E5

Pairings derived from color-wheel relationships. The complementary color sits opposite #A666E5; 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 #A666E5

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 #A666E5.

How #A666E5 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#A666E5

Protanopia#7474E5

Protanomaly#8B6FE5

Deuteranopia#8080E4

Deuteranomaly#9176E4

Tritanopia#958080

Tritanomaly#9C76B1

Achromatopsia#858585

Test a full palette in the color blindness simulator.

Using #A666E5 in Code

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

CSS custom property--color-a666e5: #A666E5;

CSS backgroundbackground-color: #A666E5;

Tailwind configcolors: { 'color-a666e5': '#A666E5' }

SwiftUIColor(red: 0.651, green: 0.400, blue: 0.898)

Android XML<color name="color_a666e5">#A666E5</color>

SVG fillfill="#A666E5"

More Purple Colors

#A666E5 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

#A666E5 Frequently Asked Questions

What color is #A666E5?

#A666E5 is a light purple — rgb(166, 102, 229) in RGB and hsl(270, 71%, 65%) in HSL. It carries no registered color name of its own; the closest named color is Rich Lilac (#B666D2), which is visibly different at a CIE76 distance of 12.71.

What is the RGB value of #A666E5?

#A666E5 is rgb(166, 102, 229) — red 166, green 102, and blue 229 on the 0-255 scale.

What is the CMYK value of #A666E5?

#A666E5 converts to approximately cmyk(28%, 55%, 0%, 10%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #A666E5 be black or white?

Black text is the more readable choice. #A666E5 scores 3.71:1 against white and 5.65:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #A666E5 as a CSS color keyword?

No. #A666E5 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 mediumorchid (#BA55D3) at a CIE76 distance of 13.47, which is visibly different.

Open #A666E5 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.