I answered you about changing the logo here. To change the colors, you’ll need to learn CSS for that, though Ceckito has a lot of options, and you can create custom colored sections through shortcodes.
Check out videos here about Ceckito: https://www.youtube.com/channel/UCZp9vUjm0datjYwAan5k83Q.
For example, you can create custom look of call to action. First you would go and create a section (in post editor click on “C”, and you’ll get pop-up). Click on Section, and you’ll see the options to set custom title color, background, background image… Click insert when you’re done.
Now go to “C” again, “Content Elements / Call to action”. Set your title and colors for call to action, and see the result.
Let us know if you have more questions.