Need help on the checkout page color and the rich text header color

Hi on my checkout page i need to change all them brown links colors to black even the border color form on the checkout page

any body know the code?

here is this url Link ttps://jah-jahs-jewelry.myshopify.com/admin/themes/127405916322/editor?previewPath=%2F56268095650%2Fcheckouts%2F216ba5b7b60074e04f045d586f864a89

Also what the code to change the rich text header color ?

Hello There,

Please share your Screenshot.
So that I will check and let you know the exact solution here.

On my checkout page the links are brown and the form border i will to change it to black i need the code to change them links because the shopify setting theme is not working

Also on the rich text section how to change the heading color to white?