Color Hunt - Curated collection of beautiful colors, updated daily
MJML - The open source framework for responsive emails
Material Palette - Generate and export your Material Design color palette
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.