When it comes to graphic design, color seems like an element that is so commonly used that it is taken for granted. In fact, a great degree of care must be taken when creating a color palette to make sure that a project doesn't suddenly go from pleasing to the eye to painful to look at.
It's therefore worth a good amount of effort for a graphic designer to choose a proper color palette, but the process doesn't have to be done without help. There are a few very useful tools out there that designers have been using for years to strike the perfect notes on the color wheel.
Adobe Color CC
Adobe, the creator of graphic design staples like Photoshop and InDesign, has a free and incredibly powerful tool online to help designers get a jump start on their project. Color CC is a web-based application that lets the user create their own color palette using some common techniques, like triads, analogous, monochromatic and more. The palettes can be easily saved and brought up for later use.
Similar to Color CC, Coolors is another free web app with similar functionality. This one is based more around browsing and random selections. A user on the site can simply press the space bar to bring up a new palette, making it easy to quickly browse. Unlike Color CC, this app brings up a huge color palette that takes up almost the entire web page, really feeding the eyes a good example of how this palette might work.
This free web app is more for slight adjustments than a full overhaul, as it contains tools that allows the user to put tints over entire color palettes to fine tune them. It's a far more minimalistic approach to color palette creation than the other two examples above, and it's open source. For more information click here https://www.youtube.com/watch?v=l9fBNwNsu08.