How can I modify product page pricing and font color in the Streamline theme?

Store Design
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1

Hello experts !

A) I would like to reverse the price, first then after

B) I would like to add the %discount right after the price, rounded 0 decimal.

C) Changing the product description font color #0000FF. I do believe this is updatable from the Theme design, section product but what do I write in the CSS ? h2 {color: #0000FF;} doesn’t work.

https://plancheelite.com/products/catgroom

2

Of course I need insight.