You can find alot of videos on YouTube for these techniques -search distress ink watercolor and you will find alot of techniques that can also be used with watercolor pencils or waterbased markers if you do not have distress inks(but I recommend distress inks,.....many many techniques for these).
I think the examples are
1. embossing a solid area stamp and coloring in the unembossed flowers with either distress inks, water based markers or watercolor pencils.
2. Putting the color with either distress inks, watercolor pencils or water based markers directly to the stamp and spritzing with water then stamping.
3. Layering these techniques with other stamps like in Jennifer McGuires video Embossed layered Resist
YouTube - Embossed Layered Resist