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#663FCA Color

#663FCA is rgb(102, 63, 202) in RGB, hsl(257, 57%, 52%) in HSL, and about cmyk(50%, 69%, 0%, 21%) in CMYK. It has no registered color name of its own — the closest is Majorelle Blue (#6050DC), clearly related but distinguishable side by side at ΔE 8.17. White text is the more readable choice on this background.

#663FCA
HEX#663FCA
RGBrgb(102, 63, 202)
HSLhsl(257, 57%, 52%)
HSVhsv(257, 69%, 79%)
CMYKcmyk(50%, 69%, 0%, 21%)
OKLCHoklch(49.6% 0.202 289.8)
LABlab(38.02% 42.81 -67.61)
LCHlch(38.02% 80.02 302.34)

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

Majorelle Blue#6050DCΔE 8.17Iris#5A4FCFΔE 10.52Lavender Indigo#9457EBΔE 13.24Iridescent Indigo#3C32CDΔE 13.65Grape#6F2DA8ΔE 14.02Persian Blue#1C39BBΔE 15.51

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

#663FCA Channel Values

How #663FCA breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 102 · G 63 · B 2028-bit channels as sent to the display
HSLH 257° · S 57% · L 52%Easiest model for building lighter and darker variants
HSVH 257° · S 69% · V 79%Matches the picker in most design tools
CMYKC 50% · M 69% · Y 0% · K 21%Approximate ink mix; confirm with an ICC profile before printing
Luminance6.71:1 vs white · 3.13:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #663FCA 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 text6.71:1AA normal AA large AAA normal
Fails AABlack text3.13:1AA normal AA large AAA normal

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

Colors That Go With #663FCA

Pairings derived from color-wheel relationships. The complementary color sits opposite #663FCA; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#663FCA
Complementary
#A3CA3F
Analogous
#3F5DCA
Analogous
#AC3FCA
Triadic
#CA663F
Triadic
#3FCA66
Split comp.
#CAAC3F
Split comp.
#5DCA3F

Tints & Shades of #663FCA

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

#7D5BD2
#9073D9
#A68FE0
#B9A7E7
#CFC3EF
#E2DBF5

Shades

#5631B4
#492A98
#3C227C
#301B64
#231448
#150C2C

Want a full 50-950 ramp with semantic roles? Generate design tokens from #663FCA.

How #663FCA 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#663FCA
Protanopia#4747CA
Protanomaly#5544CA
Deuteranopia#4F4FCA
Deuteranomaly#5949CA
Tritanopia#486060
Tritanomaly#555596
Achromatopsia#5C5C5C

Test a full palette in the color blindness simulator.

Using #663FCA in Code

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

CSS custom property--color-663fca: #663FCA;
CSS backgroundbackground-color: #663FCA;
Tailwind configcolors: { 'color-663fca': '#663FCA' }
SwiftUIColor(red: 0.400, green: 0.247, blue: 0.792)
Android XML<color name="color_663fca">#663FCA</color>
SVG fillfill="#663FCA"

More Purple Colors

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

150024fdf8ff170b22fdf4ff1b0d35faf5ff1d0731fae8ff1e0033f6cfff20002ef3e8ff3000524020605414906600cc7008e78806ce9900cca11fffb19cd9c27affcebeefe0b2eb

#663FCA Frequently Asked Questions

What color is #663FCA?

#663FCA is a mid-tone purple — rgb(102, 63, 202) in RGB and hsl(257, 57%, 52%) in HSL. It carries no registered color name of its own; the closest named color is Majorelle Blue (#6050DC), which is clearly related but distinguishable side by side at a CIE76 distance of 8.17.

What is the RGB value of #663FCA?

#663FCA is rgb(102, 63, 202) — red 102, green 63, and blue 202 on the 0-255 scale.

What is the CMYK value of #663FCA?

#663FCA converts to approximately cmyk(50%, 69%, 0%, 21%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #663FCA be black or white?

White text is the more readable choice. #663FCA scores 6.71:1 against white and 3.13:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

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

No. #663FCA 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 16.05, which is visibly different.

Open #663FCA in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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