codecov hits/misses bg in file view

[vovanmix]

1?. Make codecov hits/misses bg darker (when opening the file):

td.blob-code.codecov.codecov-on.codecov-hit {
  background-color: #eaffea;
}
td.blob-code.codecov.codecov-on.codecov-missed {
  background-color: #ffecec;
}