Theme preview colours don't show properly

I noticed that the colours for the theme buttons in Sencha Architect 3.1 don't show up properly, and after a build, they're similarly wrong, too.

SA31_theme_buttons_bad.PNG

Result:

SA31_theme_buttons_bad_demo.PNG

Pink is not my preferred colour, it's just the last one I had chosen when I changed it to something wildly different to run this test.

Theme preview colours don't show properly