First, what were you trying to accomplish? If you wanted to create a whole new color option (such as the blue, pink, red, gray), or were you only trying to change a couple of the colors here and there?
Creating a “new” color scheme can be done by taking one of the colors you’ll never use (maybe Pink?) and edit the heck out of it…knowing that if you goof it up, it won’t show simply by selection of another color in the admin customizer. You actually can create a new one by overwriting existing, or copying and then editing. It requires slight change to the color section in your Functions.php file (you add another color name to that section) and it will then become an opion choice in the drop down menu.
Go to your website and use “inspect element” in your browser. You can highlight all the sections, or pieces of each page and it shows you the .css code. You can change (edit) the code while using the inspect element and it shows you what your changes do. So you can see the color hex code, and you can either change it, or on the right side there generally is a color icon before the code. You can change the color there, even “grab” a color from elsewhere on the page to copy it.
The changes disappear when you refresh the page or exit the inspect..so take notes as to what you changed, then you go into your actual .css to apply the same change. It is actually fun.
I went into your page example and set all the colors back to #fff (white) to clean up the page to see what you had changed.
Your changing ALL the color code to the new color can sometimes not work, as some colors are for hover or backgrounds in different areas.