Light Interference Color (LIC) is an electrochemical process to color stainless steel without the use of dyes or pigments. The process uses various acids and electricity in order to grow a chrome oxide (chromate) layer on the stainless steel. The thickness of the chromate acts like a prism creating the changing color that we see on the surface of the metal. The perceived color-changing is caused by the natural physics of light interference; from different angles, the light waves are perceived by a viewer as revealing a different color from each angle. A range of colors are available, as well as finishes, all giving stainless steel a brilliant, unique look. (Reader's takeaway: the color you see is dependent on the environment and light, weather, and the angle you observe from.) Additionally, each LIC color Millennium Forms offers is produced in a range of color.


One brilliant advantage of LIC, is the surface of the material is not affected by UV rays. Nor will it fade, as painted, pigmented or dyed products tend to. Installations older than 25 years have proven that LIC coloring does not age/fade.

The most bold advantage of LIC, is the artistic styles which our colors and finishes provide, as compared to painted or anodized products.

Due to the nature of the LIC process, our products will always have natural variant in color. We use an LAB-measuring device to quantify the colors of our products. We offer a range in each color based on tolerances within each color.

LIC COLOR OPTIONS : Pewter, Bronze, Charcoal (#4 polish only), Blue, Slate (Mill finish only), Bronze Gold, Burgundy, Purple Blue(Bright finish only), Peacock, Blue Green

LAB defines color in a 3-Dimensional Space.

  • L represents Light to Dark
  • A represents Red to Green
  • B represents Yellow to Blue

We use this measurement to define our colors, our tolerances in color variation, and to control quality.

Please note: We will commit to a DELTA range. Actual LAB values may change based on material properties, material finish, and other production considerations.

TiNi (Titanium Nitride)

TiNi colors are achieved by vapor deposition. Various nitrides are plasmatised to fuse with stainless steel. These surfaces are extremely hard and are traditionally used as wear surfaces, most commonly seen on gold drill bits. The color will remain constant over time and will create a more uniform appearance than light interference color (LIC). TiNi is offered in Imperial Gold with a mirror or hairline finish. Also available in Permanent Copper with a hairline finish, for a copper look that will never patina like traditional copper.

Colors: Imperial Gold, Permanent Copper

Color Defined