There's an opportunity for an iPoker room to add a 'Theme Cloud' to poker tables as part of the 'Widgets Bar', but I've seen only William Hill and Ladbrokes do it so far (maybe there are other that I don't have an account with, but Paddy and Everest don't have it yet). The 'Snake Skin' and 'Hot Walls' themes from this cloud enjoy more readable cards and chips.
Hot Walls:
Spoiler

Snake Skin:
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(To apply them, you'll need to enable the bar, which is done by default, but after you install them, you can hide the bar, which is done in the second image, in Settings -> Widgets.)
Note that these themes are native, aren't changed to default and don't require running a separate batch script (third-party custom mods do) every time when starting the client. And (hopefully) they don't break down after each client update (only need to be reinstalled once via the Widgets Bar).
So if you like these cards and chips, ask Poker770 (or any of your iPoker rooms that doesn't have it yet) to add the Widgets Bar into their build of the client.