I painted this still-life without much planning - I just wanted to grab the beautiful array of colors in the flowers and fruit on my kitchen table before they faded away or were eaten.
I'd been reading about the "flat" surfaces of Henri Matisse as opposed to the depth created by more traditional landscape paintings. So, like a Matisse painting, this painting is flat in terms of atmospheric perspective. There are no shadows or shading so there's no sense of walking into the picture.
However, once I got to working on the left side, I felt it needed a sense of depth for the orange/ bowl of fruit/ vase of flowers because there is no space between them and I didn't want them to to appear as a single flat shape. Decreasing/ overlapping shapes creates that effect to some degree but I wanted to be sure. To my eye they appear to move back in space in the picture plane. Here's how I resolved it:
A warm, saturated yellow will push forward
For the mangos I mixed the warmest yellow I could using Cadmium Yellow and Cadmium Red Light. There is white mixed in too, which actually increases the intensity of the color to a point- after which it starts to neutralize it. Yellow is of course a warm color to start with, but Cadmium Yellow Light, for instance, is cool..so there's that nuance. I can't recall what colors I used for the pears, something warm.
A cool, greyed or neutralized purple will pull back.
For the vase, I decided to use purple, not the actual gold/brown that it is, because of purple's dynamic color relationship to yellow and to support the push/pull. I use mostly Gamblin oil paints, so I went a bit further to ensure that I used the coolest possible purple for the vase, in this case Dioxazine purple (cool) by referencing this chart:
I could have mixed a cool purple using the Gamblin chart but I happened to have Dioxazine Purple in my paint box.
The vase is also greyed/neutralized, which causes the pull of atmospheric perspective. Using the color complement (purple/yellow) will grey/neutralize a color. An even more effective greying complement would be a yellow that tended toward red, such as Cadmium Yellow. However, since that is a warm color, I may have compromised and used Hansa Yellow Light which is a cool yellow. I've integrated this color bias system into my process. It's free, makes sense, and is good info for the next time you paint yourself into a corner as I did:
Everthing I've written here I've learned from trial and error, reading, watching videos, or from other artists and workshops. It's exciting to share it. I hope it helps someone else along the way.