need quick opinion re place card holders (ordering TODAY!)

I am doing escort cards (literally cards inside an envelope. The envelope has the couple's name on it and the card inside tells them 'You are seated at Table X')

I want to use place card holders for them and really love these glass grapes. It fits with our theme of wine favors, etc. Now, my colors are navy with white and pink as accent colors. My escort card envelopes are pale blue and the calligraphy on them will be navy.

Can I do both the pink and white grapes, or should I stick with only the white? I feel like the white might be too plain, but I just want to make sure that the pink with the blue envelopes won't look silly.

Here are the place card holders:



And here are the envelopes so you can see the color blue - it's light.



ETA - for the heck of it, here are the cards that will go inside the envelope (the font is the same color as the envelope):