With the color dialog, you can select a color for your layout elements. The dialog has 2 tabs. On the first tab you have the most important base color at your disposal, on the second you can configure any shade of color you want.
Select your desired color and take it by pressing the OK button .
Change the color by moving the color sliders or enter the corresponding value in one of the input fields. The color you have configured in this way you can take by pressing the OK button .