How can I change the color of my checkout button to match my theme?

[Maze1]

can someone advice me how i can turn the checkout box black and the word ‘checkout’ in black to match my theme.

I have attached picture below.

Your Shopping Cart – Bull Bits

password - Qwerty1234!

Thank you in advance

[Dan-From-Ryviu]

Go to Online store > Themes > Edit code > open theme.liquid file, add this code after element

[Maze1]

Thank you Dan.

[Dan-From-Ryviu]

You are very welcome