Bulk change 1 colour appearing in a colour theme to another colour

I've set the colour pallete correctly, with the lightest colour in the top left and the darkest colour in the bottom right however, in the colour themes bright #1 and #2, the links (which should be pulling from the lightest colour in the site-wide pallete) is a straight white.

Does anyone know how to bulk edit a colour (in this case that white I want to be rid of) within a theme to instead become the lightest colour within the site-wide palette? See the below screenshots to hopefully understand if I'm not making sense!

You have probably manually selected white as the colour for these, you can click through them and reconnect to the palette, or see my other reply to you about resetting the colour theme.

Thanks Ziggy - I am trying change all instances of one colour to another in all themes - rather than going through and manually changing each instance of the colour. Is there a way to do this that you are aware of?

Also, you can see in the screen shot below that I have a dark colour set to the bottom right yet the buttons are not utilising this colour, they are instead a staight black? This doesn't make sense to me why this is happening? Do you know why and how I can fix this?