Rough find and replaces that I did:

text-indigo-600
text-indigo-600 dark:text-indigo-400

text-gray-900
text-gray-900 dark:text-white

bg-white
bg-white dark:bg-gray-700

bg-gray-100
bg-gray-100 dark:bg-gray-900

hover:bg-gray-50
hover:bg-gray-50 dark:hover:bg-gray-800

text-gray-500
text-gray-500 dark:text-gray-200

text-gray-800
text-gray-800 dark:text-gray-100

bg-indigo-600
bg-indigo-600 dark:bg-indigo-400

border-gray-100
border-gray-100 dark:border-gray-900

divide-gray-200
divide-gray-200 dark:divide-gray-800

text-gray-600
text-gray-600 dark:text-gray-300

text-gray-700
text-gray-700 dark:text-gray-200

focus:text-gray-700
focus:text-gray-700 dark:focus:text-gray-200

hover:text-gray-700
hover:text-gray-700 dark:hover:text-gray-200

hover:text-gray-900
hover:text-gray-900 dark:hover:text-gray-100

hover:border-gray-300
hover:border-gray-300 dark:hover:border-gray-600

border-gray-200
border-gray-200 dark:border-gray-800

divide-gray-100
divide-gray-100 dark:divide-gray-900

bg-gray-100
bg-gray-100 dark:bg-gray-800

hover:bg-gray-100
hover:bg-gray-100 dark:hover:bg-gray-800

class="bg-gray-50"
class="bg-gray-50 dark:bg-gray-600"

Replace implicit text-black with text-gray-100

from frl.