color palette generators I like

Required reading — Why should you begin your project by choosing a color palette?

Good tools for generating a palette:

• Muzli Colors
• Canva — Color Wheel
• Color Scheme Designer 3 (very fancy!)
• ColorSpace
• SchemeColor
• Coolors (warning: they do try to upsell you)

Lists of suggested color palettes:

• Flat UI Colors
• Color Hunt
• Canva — Color palettes

If you want to read up on the theory behind these palettes:

• by Wikipedia
• by Worqx (this is divided into ~10 pages; click the links on the left)
• by WebAscender
• by EasyEdit