Highlight words in a heading

Site URL: https://chartreuse-grape-fjj5.squarespace.com/?noredirect

I would like to make two specific words in my headline a different colour to the rest of the paragraph. There does not seem to be a way to do this within Squarespace's capabilities, so I assume there is custom code required. Can someone show me how to do this please?

First, you need bold these word. Then share url again. We will give the code to highlight these words.

@tuanphan, thanks so much for your help. Here is the link with the words I want to change to orange in bold:

https://chartreuse-grape-fjj5.squarespace.com/?noredirect

Unfortunately you can't clearly see which words are in Bold due to the font choice, so for your reference, I would like "structural" and "architectural" to be orange: EC7A43