Material Palette - Generate and export your Material Design color palette
Adobe Capture - Turn any photo into a color theme, Look, vector graphic, or unique brush that you can use in your creative projects with Adobe Capture.
Material UI Colors - Color palette for material design
Gradient Hunt - Curated collection of beautiful gradients, updated daily
Picular - Google, but for colors.
Ultimate CSS Gradient Generator - Ultimate CSS gradient color code creators are always in eye of designers. CSS gradient or CSS progression codes.