Some Structure Theme Colors not Change

I download this premium theme](Structure - Construction Industrial Factory WordPress Theme Preview - ThemeForest) and started to build a site. I made some changes in “appearance- customize-colors” but the colors do not change when I click publish and refresh the webpage.
Please let me know How Can I change the text color and background color of the theme, such as the footer, the copyright such as the yellow column under the banner, the colors I want to use in copyright is " #666666 for background, #c9bc9c for text, #e8e8e8 for footer background, #666666 for footer text, and #036eb8 for the column under the banner