Bad contrasting on prosites checkout box

Hello, I am still a noob here :^)

I am brand new and am just setting up pro-site plugin. I went to my created checkout page and noticed that the text to background resolution is hard to read (basiclly the text and background don’t have enough contrast to make it readable). I would like to know how change this without too much coding…I am not a coder and know very little. I am using the Network Child theme. So, if you could tell me which line and file the code is in I may be able to change the hex of the text. My site:

Current hex colors that cause low contrast:

box (center) = #5D7A93

text = #716260