What is the hex code for #666699?

The hex code for #666699 is #666699. In RGB that is rgb(102, 102, 153).

What is the CMYK value of #666699?

#666699 converts to CMYK cmyk(33.3%, 33.3%, 0%, 40%) for print, and OKLCH oklch(0.5316 0.0795 283.37) for modern color workflows.

What is the closest Pantone color to #666699?

The closest Pantone-style match to #666699 is PANTONE 18-3838 (Ultra Violet). This is an approximation labeled "closest match", not an official Pantone value.

#666699 — #666699

#666699 hex code is #666699. Below are all common color formats, the nearest CSS named color, and the closest Pantone-style match.

#666699rgb(102, 102, 153)

#666699 is a hex color. Here are its RGB, HSL, HSV, CMYK and OKLCH values, the nearest CSS named color, and the closest Pantone-style match.

#666699 in every format

HEX	#666699
RGB	rgb(102, 102, 153)
HSL	hsl(240, 20%, 50%)
HSV	hsv(240, 33.3%, 60%)
CMYK	cmyk(33.3%, 33.3%, 0%, 40%)
OKLCH	oklch(0.5316 0.0795 283.37)

#666699 to Pantone & nearest name

Nearest CSS named color	slategray
Closest Pantone-style match	PANTONE 18-3838 · Ultra Violet
Readable text color on this background	#FFFFFF

Pantone result is the nearest entry in our approximation set and is labeled "closest match" — it is not an official Pantone color value.

Convert another color

#666699nearest CSS color: slategray

HEX#666699

RGBrgb(102, 102, 153)

HSLhsl(240, 20%, 50%)

HSVhsv(240, 33.3%, 60%)

CMYKcmyk(33.3%, 33.3%, 0%, 40%)

OKLCHoklch(0.5316 0.0795 283.37)

Nearest CSS named color

slategray

Closest Pantone-style match

PANTONE 18-3838 · Ultra Violet

Pantone match is an approximation labeled "closest match" — not an official Pantone value.

Get this color as JSON (developer API)

curl "https://color.wrapper-agency.com/api/v1/color?value=%23666699"

Free color-conversion API — no key during beta. Returns all formats plus nearest named and closest Pantone-style match.

Related colors

Spotify Green

#1DB954

International Klein Blue

FAQ

What is the #666699 hex code?: #666699 is #666699.
What is #666699 in RGB and CMYK?: #666699 is rgb(102, 102, 153) in RGB and cmyk(33.3%, 33.3%, 0%, 40%) in CMYK.
Is this an official Pantone value?: No. HueKit shows the closest match from an approximation set for guidance only. For production print, confirm against an official Pantone guide.