I used some really cheap watercolour paint that comes in tubes for my background. I squeezed the paint out onto pans and left them to harden for a few hours. It's my preferred paint, aside from reinkers, which aren't really paint. The thing I like most about it is that I can easily add in white to soften the look.
Please note that the splatters that look like brown spots on this card are really gold Colour Shine by Heidi Swapp (we are having clouds and rain all week). See detail below.
And, yes, I made another card with Tulip Time. I also used Still Life: Summer and a masked sentiment from Perfect Pairing. Hubby "strongly dislikes" my cherries that are uncoloured; and in fact thinks I've lost my mind for pairing the tulips with cherries. I'm calling it whimsical. Just to please him, and to see if he was right, I also stamped them in colour, but I preferred the outlines only on this card. The good news (for me) is that I had plenty of fruit left over to make other cards, which you'll be seeing in the near future. 😉 One of them may even have a colour wash background! 😃