The default definition of 'gray-dark' and 'dark' is #343a40 and this color is used several times for various selectors.
The table-dark and table-head th borders use color #32383e - defined as "color: $table-dark-color;" in the _tables.scss - which to the naked eye is virtually identical as #343a40.
So, I suggest that the color used for "color: $table-dark-color;" is changed to #343a40.
Sorry, I have looked for the theme-colors map but can't find it anywhere to edit it so I can't submit a pull request.
The default definition of 'gray-dark' and 'dark' is #343a40 and this color is used several times for various selectors.
The table-dark and table-head th borders use color #32383e - defined as "color: $table-dark-color;" in the _tables.scss - which to the naked eye is virtually identical as #343a40.
So, I suggest that the color used for "color: $table-dark-color;" is changed to #343a40.
Sorry, I have looked for the theme-colors map but can't find it anywhere to edit it so I can't submit a pull request.