@ParallaxKnight I'm not able to replicate the issue (see screenshots, below).
Can you post the following details:
Whether you are using Vim or Neovim, and which version.
Which terminal/GUI you are using, and the color depth.
Issue reproduction instructions with a minimal vimrc - The vimrc should only include what's necessary to load the colorscheme, along with the variables set.
After adding g:xcode_match_paren_style to 1. Highlights is still blue with white