How to get a great color combination for cards and other hints.

Use of the Color Wheel, Water Color Pens, Blender pen and link to US postage information are all included

in this post. 

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I love this color combination.  I found it on my color wheel. I choose them from the complimentary color straight across from each other.  You could also choose a Triad or a tetrad.  I keep this color wheel tacked above my work area.  It always helps when I am stumped.  

I needed a flat card for mailing so I wanted to just watercolor a stamp with my watercolor pencils and use a blending pen to blend the colors on the stamp.  I was able to layer the stamped picture but did not use any foam tape or ribbon or anything with depth to make it hard to mail.  This one is going abroad.
In the US you can mail anything with a bow or other dimension or something rigid in it up to 1/4"thick for an extra 20 cents and you can even buy an attractive $.70 stamp.  I just bought a sheet to make it simpler.
There is also an international stamp you can buy for over seas letters and cards. Here is a link for figuring US postage http://pe.usps.com/businessmail101/mailcharacteristics/letters.htm