#664BAA Color

#664BAA is rgb(102, 75, 170) in RGB, hsl(257, 39%, 48%) in HSL, and about cmyk(40%, 56%, 0%, 33%) in CMYK. It has no registered color name of its own — the closest is Royal Purple (#7851A9), clearly related but distinguishable side by side at ΔE 7.15. White text is the more readable choice on this background.

#664BAA

HEX#664BAA

RGBrgb(102, 75, 170)

HSLhsl(257, 39%, 48%)

HSVhsv(257, 56%, 67%)

CMYKcmyk(40%, 56%, 0%, 33%)

OKLCHoklch(49% 0.146 293.4)

LABlab(38.62% 28.97 -47.90)

LCHlch(38.62% 55.98 301.16)

What #664BAA 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 #664BAA, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Royal Purple#7851A9ΔE 7.15 Plump Purple#5946B2ΔE 8.45 Purple Heart#69359CΔE 11.14 Rebecca Purple#663399ΔE 11.32 Slate Blue#6A5ACDΔE 12.36 Dark Slate Blue#483D8BΔE 12.37

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

#664BAA Channel Values

How #664BAA 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 102 · G 75 · B 170	8-bit channels as sent to the display
HSL	H 257° · S 39% · L 48%	Easiest model for building lighter and darker variants
HSV	H 257° · S 56% · V 67%	Matches the picker in most design tools
CMYK	C 40% · M 56% · Y 0% · K 33%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	6.66:1 vs white · 3.15:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #664BAA 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.

TextWhite text6.66:1AA normal AA large AAA normal

Fails AABlack text3.15:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #664BAA in the contrast checker.

Colors That Go With #664BAA

Pairings derived from color-wheel relationships. The complementary color sits opposite #664BAA; 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 #664BAA

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 #664BAA.

How #664BAA 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#664BAA

Protanopia#5050AA

Protanomaly#5A4EAA

Deuteranopia#5555AA

Deuteranomaly#5C51AA

Tritanopia#555E5E

Tritanomaly#5C5783

Achromatopsia#5C5C5C

Test a full palette in the color blindness simulator.

Using #664BAA in Code

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

CSS custom property--color-664baa: #664BAA;

CSS backgroundbackground-color: #664BAA;

Tailwind configcolors: { 'color-664baa': '#664BAA' }

SwiftUIColor(red: 0.400, green: 0.294, blue: 0.667)

Android XML<color name="color_664baa">#664BAA</color>

SVG fillfill="#664BAA"

More Purple Colors

#664BAA 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

#664BAA Frequently Asked Questions

What color is #664BAA?

#664BAA is a mid-tone purple — rgb(102, 75, 170) in RGB and hsl(257, 39%, 48%) in HSL. It carries no registered color name of its own; the closest named color is Royal Purple (#7851A9), which is clearly related but distinguishable side by side at a CIE76 distance of 7.15.

What is the RGB value of #664BAA?

#664BAA is rgb(102, 75, 170) — red 102, green 75, and blue 170 on the 0-255 scale.

What is the CMYK value of #664BAA?

#664BAA converts to approximately cmyk(40%, 56%, 0%, 33%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #664BAA be black or white?

White text is the more readable choice. #664BAA scores 6.66:1 against white and 3.15:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #664BAA as a CSS color keyword?

No. #664BAA 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 rebeccapurple (#663399) at a CIE76 distance of 11.32, which is visibly different.

Open #664BAA in a Tool

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