Reply To: How to Change Logo font color & mouse hover color

You can paste the following in Customizer -> Additional CSS:

For text based logo:

.site-header h1 a {
    color: #0099ff;
}
a.site-description {
    color: #0099ff;
}

For hover

.site-header h1 a:hover {
    color: #ffffff;
}
.top-header .site-description:hover {
color: #ffffff;
}

Change the hex colors as per your choice.

Note: hover code updated