Reuse the current color

/* Bad */
div {
    color: #d1d5db;
    background-image: linear-gradient(to bottom, #d1d5db, #fff);
}

/* Good */
div {
    color: #d1d5db;
    background-image: linear-gradient(to bottom, currentColor, #fff);
}

/* Bad: Declare same color in three places */
div {
    color: #fff;
}
div a {
    border-bottom: 1px solid #fff;
    color: #fff;
    text-decoration: none;
}

/* Good */
div {
    color: #fff;
}
div a {
    border-bottom: 1px solid currentColor;
    color: currentColor;
    text-decoration: none;
}