can't change hover link color

Hi everyone,
I really like your theme, I just have a little bit of a problem. I have some links in a text widget I put in the sidebar. The default color is light blue, so I wrote this css to change the link color and eliminate the bottom border, and it works fine

.textwidget a {
    border-bottom: none;
    color: #ea1a1a;
}

Then I wrote this code to change the hover color and the underline

.textwidget a:hover {
    text-decoration: line-through;
    color: #ea1a1a;
}

the line through is working, the color is not changing from blue to red. What am I doing wrong?

Thank you very much,
A.