Added color options for the gray font on the home page background

[jdzhu19]

Prerequisites

• I have searched for duplicate or closed feature requests
• I am mindful of the project scope

Proposal

When I use the https://github.com/HugoBlox/theme-academic-cv to configure, I find that although the black and white of the font in the second half of the page can be adjusted through the theme, there is no place to configure the color option of the gray font on the background. For example, when I want to configure a light background to replace the default green gradient image background, the font will be difficult to read.

Motivation and context

lack color options for the gray font on the home page background

[github-actions]

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