Hello Jaduho !

You may find the folowing lines in the Studio->Designer->Splash area:

.bx-spl-line.bx-spl-l2 .bx-spl-cicon .animation {

        width: 4.25rem;

        height: 4.25rem;

    }

and add after it the following code:

.bx-splash .bx-def-font-h1 {

// your new colors here

}