how to change default black theme?

i want to change default theme (black) of this component but refer to 
<img width="535" alt="image" src="https://user-images.githubusercontent.com/47767846/158783793-3db03777-7fe2-49d6-b3f3-716b46f30665.png">
it only can change at text container level not a parent. may you can tell me? thank you.