It's not a blog, but you could try the Pendemic Discord: https://discord.gg/pendemic
I'm really hoping this community builds up, though, as I'm not a huge fan of Discord as a discussion board. I really need to post my collection and start contributing!
My favourite is Diamine Sargasso Sea. It's vivid and stands out, but it's "normal" enough to use in professional situations.
It's also an exact colour match for my daily driver pen (Pineider Avatar UR in ultramarine), which is a big plus point.