I have used a colour scheme of Basic Gray, Smoky Slate, Tempting Turquoise and Whisper White. This is a card that I posted several months ago, but I have been asked numerous times on how I created the background, so here goes.
I randomly sponged Tempting Turquoise over a piece of Whisper White cardstock measuring 9cm x 13.3cm.
I then randomly sponged on Basic Gray.
I then sponged on Smoky Slate.
I then lightly spritz this piece with water to blend the colours together. You can leave this step, however the colours will not be blended together as well, It also mutes the colour of the ink slightly. Dry this off with the heat gun to speed up the process.
Once the piece is dry you can stamp your images. I used Smoky Slate to do my stamping using the solid leaf stamp from the Summer Silhouettes stamp set and the Music Note Wheel. I off stamped the Music Note Wheel to get a lighter colour of ink.
The next step is to spritz the piece with Vanilla Shimmer Smooch Spritz to give it a lovely shimmery finish. It does not show up very well in the photo, but the finished effect is beautiful, it also lightens the Smoky Slate stamped images. I then stamped each corner with the small splodge stamp (not sure how to describe this stamp) from the Clockworks stamp set in each corner with Tempting Turquoise ink. This piece will now be slightly wonky, but do not panic as when you stick it down to the base card it flattens out.
You are now ready to make your card. I used a Smoky Slate mat 9.5cm x 13.8cm, a Whisper White mat 10cm x 14.3cm and a Basic Gray card base (a piece of A4 cut in half lengthwise). The inside of the card is a Whisper White piece 10cm x 14.3cm with a White embossed butterfly on Smoky Slate adhered to the bottom right corner.
On my card I have used a doily (cut down to 3/4), a piece of Smoky Slate DSP 2.5cm x 9cm with the sentiment from the Teeny Tiny Sentiments stamp set stamped in Basic Gray, a piece of Tempting Turquoise cardstock punched with the Scallop Trim Border punch, Basic Gray Stitched Grosgrain, frame from the Chalk Talk stamp set (stamped with Smoky Slate on Whisper White) and cut out with the matching Framelit, a 1 1/4" circle of the same background I made with the sponging and spritzing technique, White embossed butterfly from the Backyard Basic stamp set and the matching Framelit (this is on Smoky Slate). The frame piece is lifted slightly with dimensionals.