I think this might be the penultimate Monterey Bay Aquarium color exercise. Here, have some striking sea anemones:
I used Palettes for iPad to pull out this set of colors:
And then used Sketchbook Express to paint in squares of color in a grid. I used a design from Sarah Don’s Fair Isle Knitting, sample 11 on page 37.
I didn’t care for the grid lines, but I realized while cropping the result that I could have fun with the preset filters in my photo editing apps. I was actually kind of surprised by how much easier it was to visualize a finished product based on the result.