Ghost/ghost/admin/app/styles/components/badges.css

/* Badges
/* ---------------------------------------------------------- */

.gh-badge {
    display: inline-block;
    padding: 2px 4px 3px;
    border: color(var(--green) blackness(+8%)) 1px solid;
    color: #fff;
    font-size: 0.8em;
    line-height: 1em;
    font-weight: 400;
    text-align: center;
    text-shadow: 0 -1px 0 rgba(0,0,0,0.1);
    white-space: nowrap;
    user-select: none;
    background: linear-gradient(
    color(var(--green) whiteness(+4%)),
    color(var(--green) blackness(+4%))
    );
    border-radius: 3px;
}

.gh-badge-blue {
    border: color(var(--blue) blackness(+8%)) 1px solid;
    background: linear-gradient(
    color(var(--blue) whiteness(+10%)),
    color(var(--blue) blackness(+4%))
    );
}

.gh-badge-red {
    border: color(var(--red) blackness(+8%)) 1px solid;
    background: linear-gradient(
    color(var(--red) whiteness(+10%)),
    color(var(--red) blackness(+4%))
    );
}

.gh-badge-black {
    border: color(var(--darkgrey) blackness(+8%)) 1px solid;
    background: linear-gradient(
    color(var(--darkgrey) whiteness(+10%)),
    color(var(--darkgrey) blackness(+4%))
    );
}

.gh-badge-outline {
    border-color: color(var(--midgrey) l(+35%));
    color: color(var(--midgrey) l(+25%));
    font-weight: 400;
    background: transparent;
    box-shadow: none;
}