Change Button Font Color On Hover With "hover Color" Declared On Each Button Tag Not In Css

It's not a duplicate question - I don't want to simply change the font color in CSS. My Issue: I have products with colors. Blue, Red, Green, Yellow, Purple - any kind of color. I

Solution 1:

Consider CSS variables like this:

a.btn {
 padding:0 10px;
 color:#000;
 border:1px solid;
}
a.btn:hover {
  color:var(--h, yellow);
}

<a href="#" class="btn btn-inv btn-lg" style="--h: #4a62ab">BUY</a>
<a href="#" class="btn btn-inv btn-lg" style="--h: red">BUY</a>
<a href="#" class="btn btn-inv btn-lg" style="--h: green">BUY</a>
<a href="#" class="btn btn-inv btn-lg" style="--h: #4a00fb">BUY</a>
<a href="#" class="btn btn-inv btn-lg">BUY</a> <!-- this one will get the default color (yellow) -->