I love the spacemacs-light theme, but for some reason, the transparent dashboard images showed up with a light tint, which I eventually tracked to the fact that Doom by default uses the font-lock-comment-face for the dashboard banner image, and this this face has a background color in Spacemacs-light. I redefine the doom-dashboard-banner face to use the default face, which fixes the problem. Another way to fix it (commented out below) is to disable the background tint color in the theme. While we are at it, I also fix doom-dashboard-loaded, which suffers from the same problem.