Adobe Color CC (formerly Kuler https://color.adobe.com), enables you to create and save colors and harmonious color themes right in your browser. Those themes and swatches can easily be transferred into Illustrator (and other CC desktop applications) via the Creative Cloud Libraries feature. Here's the very simple 3-step process to do that. Note that you will need an active Creative Cloud subscription.
Step 1: MIx your colors and then click the Save button in Color CC.
Step 2: Choose a CC library and name the swatch theme.
Step 3: Inside Adobe Illustrator, load the swatches from the Libraries panel (Window > Libraries).
Yes. Thank you. The Kuler Color Themes panel allows access to existing Kuler themes and, via the buttons at the bottom of the panel, to Kuler on the Web. From there, follow my instructions above to add custom swatch sets into your CC Libraries.