Color is an important part of any app. One easy way to utilize color effectively is to use a color scheme designer so that you use colors that mesh well with each other. If you are building a cross platform app with Delphi XE8 Firemonkey for Android, IOS, OSX, and Windows you may want to have a uniform look across all platforms to solidify your brand image. One tool that I use is available at Paletton.com. It provides a variety of different tools to design a color scheme for your app. These include a color wheel with 4-5 different options. Those options are: monochromatic, adjacent colors, triad, tetrad, and freestyle. What this allows you to do is create a color palette of complementary colors. It provides 5 different shades of the same color in each color palette and then with the options like triad and tetrad it will combine the complementary colors into a single palette. Be sure to check out the Presets area as well to walk up and down the different shades of color that you have picked. Once you have selected a scheme that you like you can simply cut and paste the RGB colors into the color properties of your app. The other thing I do is screenshot the color palette and then use a color dropper to access each RGB value. You can use color in your Firemonkey apps using premium styles, TRectangles, Fills and Strokes, Gradients, and Font colors (plus a whole host of other ways). It can be as simple as adding a background TRectangle with a Fill color to your app Toolbar or as complex as themeing out your whole app. Obviously you can use this color scheme designer tool with Appmethod, C++Builder, and really any other tool that utilizes RGB colors.