Hi , the reasoning for the colors is explained in the post, and I paraphrase, "logos benefit from strong, saturated colors which makes them more recognizable and memorable. The purple shades symbolize misticism and spitirtuality, that's why I went for those uplifting colors". Do you have a color preference in mind? If so, please point it out. In terms of legibility the monochrome version can be edited as well, but I found these versions were more legible, that's why the exact inverse doesn't really work the same in black and white. But I can provide the exact inverse if it feels better for you.
RE: Logo Proposal for SteemLadder and how to select the best proposal