Use ColorPicker to sample a real interface and produce a small palette with named HEX and RGB values. Check conversions, contrast for text and controls, and how the values are copied into design tokens or CSS. Reopen the palette and verify the exact values survive.
A color tool is useful when the team shares a reproducible specification. Test the colors on the actual display context and keep approved tokens in version control rather than relying on a visual swatch alone.
Akousa