#663DEB Color

#663DEB is rgb(102, 61, 235) in RGB, hsl(254, 81%, 58%) in HSL, and about cmyk(57%, 74%, 0%, 8%) in CMYK. It has no registered color name of its own — the closest is Palatinate Blue (#273BE2), visibly different at ΔE 11.82. White text is the more readable choice on this background.

#663DEB

HEX#663DEB

RGBrgb(102, 61, 235)

HSLhsl(254, 81%, 58%)

HSVhsv(254, 74%, 92%)

CMYKcmyk(57%, 74%, 0%, 8%)

OKLCHoklch(52.2% 0.242 285.2)

LABlab(40.14% 51.37 -83.01)

LCHlch(40.14% 97.62 301.75)

What #663DEB 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 #663DEB, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Palatinate Blue#273BE2ΔE 11.82 Iridescent Indigo#3C32CDΔE 12.15 Blue Violet#8A2BE2ΔE 13.65 Violet (Caran D'ache)#6E00C0ΔE 17.23 Majorelle Blue#6050DCΔE 19.04 Lavender Indigo#9457EBΔE 19.39

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

#663DEB Channel Values

How #663DEB 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 61 · B 235	8-bit channels as sent to the display
HSL	H 254° · S 81% · L 58%	Easiest model for building lighter and darker variants
HSV	H 254° · S 74% · V 92%	Matches the picker in most design tools
CMYK	C 57% · M 74% · Y 0% · K 8%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	6.12:1 vs white · 3.43:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #663DEB 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 text6.12:1AA normal AA large AAA normal

Fails AABlack text3.43:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #663DEB in the contrast checker.

Colors That Go With #663DEB

Pairings derived from color-wheel relationships. The complementary color sits opposite #663DEB; 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 #663DEB

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 #663DEB.

How #663DEB 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#663DEB

Protanopia#4646EB

Protanomaly#5543EB

Deuteranopia#4D4DEB

Deuteranomaly#5847EB

Tritanopia#336A6A

Tritanomaly#4C5CAD

Achromatopsia#626262

Test a full palette in the color blindness simulator.

Using #663DEB in Code

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

CSS custom property--color-663deb: #663DEB;

CSS backgroundbackground-color: #663DEB;

Tailwind configcolors: { 'color-663deb': '#663DEB' }

SwiftUIColor(red: 0.400, green: 0.239, blue: 0.922)

Android XML<color name="color_663deb">#663DEB</color>

SVG fillfill="#663DEB"

More Blue Colors

#663DEB sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024 fafaff 00002e f9fafb 000033 f8fafc 000038 f8f8ff 000042 f5faff 000047 f5f5ff 002147 007dfa 0f52ba 1c39bb 2a3439 372aac 4e3cc3 64609a 7abdff 979aaa b8dbff d6d6ff

#663DEB Frequently Asked Questions

What color is #663DEB?

#663DEB is a mid-tone blue — rgb(102, 61, 235) in RGB and hsl(254, 81%, 58%) in HSL. It carries no registered color name of its own; the closest named color is Palatinate Blue (#273BE2), which is visibly different at a CIE76 distance of 11.82.

What is the RGB value of #663DEB?

#663DEB is rgb(102, 61, 235) — red 102, green 61, and blue 235 on the 0-255 scale.

What is the CMYK value of #663DEB?

#663DEB converts to approximately cmyk(57%, 74%, 0%, 8%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #663DEB be black or white?

White text is the more readable choice. #663DEB scores 6.12:1 against white and 3.43:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #663DEB as a CSS color keyword?

No. #663DEB 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 blueviolet (#8A2BE2) at a CIE76 distance of 13.65, which is visibly different.

Open #663DEB 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 blue in the color library, the guide to shades of blue, or the full color library.