RAL 640-4
Rich Serpentine
RAL 640-4 Rich Serpentine is a deep serpentine green with cool mineral undertones from the RAL Effect 640 group. This saturated, assertive shade commands attention on automotive components, machinery housings, and exterior cladding systems. Its strong geological presence and excellent opacity make it a reliable choice for high-impact coatings.
Color Reference
RAL Effect colors combine a base shade with a metallic or pearl variant. Base shades (-1 through -6) offer tonal gradation within a color family. The -M suffix indicates a metallic finish with shimmer and depth for architectural and automotive applications.
WCAG 2.1 AA requires 4.5:1 contrast for normal text. Results show this color as a background.
Spectrum & Perceptual Position
CIELAB is a perceptually uniform color space. Euclidean distance between two colors in this diagram closely matches human visual difference. The dot size shows your selected color; slightly larger dots are the nearest perceptual neighbors.
Build a Palette Around Rich Serpentine
Palette Generator
Select a harmony type, then press Space to reroll unlocked colors.
Reference + opposite hue with tonal variations
Contrast ratios follow WCAG 2.1 guidelines. Green (≥4.5:1) passes AA for normal text. Amber (≥3:1) passes for large text only. Grey indicates low contrast.
Ready to Coat in Rich Serpentine?
Get a free, no-obligation quote for your project. Upload photos, describe your parts, and we will respond within one business day.