Skip to main content

Siam

#666F5D

Siam is a neutral medium color with the hex code #666F5D. This muted hue can be represented as RGB 102, 111, 93 in digital design or CMYK 8%, 0%, 16%, 56% for print applications. Find matching Pantone color.

Siam color values

HEX
#666F5D
RGB
102, 111, 93
HSL
90°, 9%, 40%
CMYK
8, 0, 16, 56

Shades & tints

Darker Lighter

About this color

Siam sits at 90° on the color wheel with 9% saturation and 40% lightness, placing it in the green segment of the spectrum. At near-zero saturation, it reads as a pure gray, with hue playing almost no role in its character. Its mid-range lightness positions it as a mid-tone: neither a background color nor a deep accent, but something in between.

In digital environments, Siam is rendered as rgb(102, 111, 93), where the green channel leads at 111, with red and blue channels close behind. This muted, medium-toned character adapts well to supporting roles: borders, disabled states, secondary text, and structural UI elements.

For print, Siam translates to a CMYK breakdown of 8C 0M 16Y 56K. A substantial black component (56%) anchors this color in print. The remaining ink channels supplement rather than drive the hue, which keeps the result stable across different paper stocks. No brands in the brandkit.pro library currently specify this exact hex as a named brand color.

Color harmonies

Complementary

Split-Complementary

How to use Siam

CSS Variable 

:root {
  --brand-primary: #666F5D;
  --brand-primary-rgb: 102, 111, 93;
}

Define as a CSS custom property for consistent theming across your site.

Tailwind Config 

colors: {
  brand: '#666F5D',
}

Add to your Tailwind config to use classes like bg-brand.

Print Design (CMYK) 

C: 8%
M: 0%
Y: 16%
K: 56%

Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.

RGB for Screens 

rgb(102, 111, 93)
rgba(102, 111, 93, 0.8)

Use RGB notation for compatibility or add alpha channel for transparency.

Frequently asked questions

What color is #666F5D?
#666F5D is Siam, a neutral medium color with RGB values of 102, 111, 93. It has a hue of 90°, 9% saturation, and 40% lightness in the HSL color space.
What is the RGB value of #666F5D?
The RGB color code for #666F5D is rgb(102, 111, 93). This means it contains 102 red, 111 green, and 93 blue in the RGB color model.
Is Siam a warm or cool color?
Siam (#666F5D) is a neutral color, sitting between warm and cool on the color wheel.
How do I use #666F5D in CSS?
You can use #666F5D in CSS with: background-color: #666F5D; or color: #666F5D; or as an RGB value: rgb(102, 111, 93). For print design, use CMYK: 8%, 0%, 16%, 56%.

Color tools