Is there any tutorial about making own customize theme?

is there any tutorial about making own customize theme ?
i am a bit confusing even looking documentation and not knowing how to start.

Please take a look at my guide for running an edx-platform fork. FAQ: Running an edx-platform Fork with Tutor - #2 by uetuluk - Show & Tell - Open edX discussions

You do not need to follow the instructions on the edx-platform part, especially in the second half of section 3.2.

After you are set up, you can follow the custom theme guidelines. Changing the appearance of Open edX — Tutor documentation

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