I photographed a few flowers in vases using a technique called Focus Stacking, creating multiple shots at with different focus points combined to make a sharper image. It is easier with certain cameras that have a special feature. Nikon calls it focus shifting instead. I still need to learn more about light placement to make the photos prettier. I do prefer vases that aren't shiny or reflective. I tried to play with my collection of vases to make nice color combinations.
I liked red, yellow, and green even though they aren't contrasting or analogous colors. It looked like Autumn.
Yellow and purple are contrasting colors
All red shades and green is the opposite of red.