Filtron - Create and share your own photo filters on Mac & iPhone
CSSGradient.io - As a free css gradient generator tool, this website lets you create a colorful gradient background for your website, blog, or social media profile.
CSSCO - VSCO Filters with CSS
Color Palette Generator - Enter the URL of an image and find its color palette
Instagram.css - Complete set of Instagram filters in pure CSS
Klart.io Colors - A data-driven collection of beautiful color palettes 🌈