Color is certainly a very important element of a design, and deciding on the best color palette for a project is something you really need to dedicate time to. From understanding color theory to having a glimpse of color psychology, you need to make sure your choice will not only look good but also have a good balance and deliver the right message. Thinking about, that we have decided to gather some tips, books recommendations, links to interesting readings and also some tools and apps that will make your life easier when it comes to color.
About: This small web app helps you to copy the colors from Flat UI.
Old but really good!
Scroll around to get the color you want, click it and they will save it for you.
Colorful words to show you colors in action.
Also old but also good.
Color Design Workbook: A Real World Guide to Using Color in Graphic Design
About the book: Since color is such a important part of graphic design, designers need the most up to date as well as the most fundamental, information on the subject to have the tools needed to use color effectively. From the meanings behind colors to working with color in presentations, this book provides readers with the vital information needed to apply color creatively and effectively to their design work. Readers also receive guidance on talking with clients about color and selling color ideas. The science behind color theory is also explained in easily understood language, and case studies are included to show the effects some color choices had on both their clients and consumers.
Color by Betty Edwards: A Course in Mastering the Art of Mixing Colors
About the book: Using techniques tested and honed in her five-day intensive color workshops, Edwards provides a basic understanding of how to see color, how to use it, and-for those involved in art, painting, or design-how to mix and combine hues. The book includes more than 125 color images and exercises.
Color – Messages & Meanings: A PANTONE Color Resource
About the book: There is no one in the business world that doubts the impact of colour. Those involved in marketing, design, advertising, and retail need to be as informed as possible about the usage of colour as a means of instant communication in order to make appropriate colour decisions. This guide explains the emotional response to colour and covers the latest guidelines for effective colour combinations including the integration of colour trends. With up-to-date visuals and printing formulas to eliminate guesswork, this guide empowers and equips its users to make smart informed decisions.
Pantone’s Guide to Communicating with Color
About the book: This authoritative guide presents hundreds of color combinations and color principles needed to create effective designs. Every lesson is demonstrated by example, enabling designers of all specialties and levels of experience to make the best color choices for every type of design.
Links and More
A very nice color cheat sheet from Carey Jolliffe.
Here's some other articles that you will definitely find useful.