Accessibility within the RPC
How we can make it a better place for everyone. These tips are coming from a accessibility educator and web tester. It's not comprehensive, but meant to give you a crash course. Especially on the most common RPC trends.
General
The more you deviate from standard English writing, the more people are going to be less likely to be able to read and interact with you. People with disabilities, neuro-divergence, or even normal people whose time is limited will be effected with each deviation.
While tools exist to make these things easier to curate someone's experience, their functionality is limited. The large majority of them work by modifying standard English sentence structure. They tend to break or not function properly otherwise.
Some screenreaders for example struggle with all lowercase/uppercase text, double/multi spacing between words, lack of punctuation, etc. They will end up reading the text back in very odd ways.
Color can be make it difficult as well. The themes on Tumblr are varied. Your writing partner could be using these theme and your colored text is nearly impossible to read because of their theme. There are also color contrast issues for people with varying degrees of color blindness.
Accessibility is not one size fits all. Talk with your writing partners about their specific needs.
Tips for a more accessible blog and replies
Look for themes / carrds that are W3G compliant.
Don't use all lowercase text in your replies ( lapslock ).
Don't use all uppercase text outside of well-known acronyms.
Don't put multiple spaces between your words.
Use punctuation in your sentences.
Don't use color in your blog's text.
Use themes / carrds that say what the button/link is for. I, II, III, IV don't really give an indication of what's there. List it out: Rules, Muses, Connections, etc.
Make sure your theme uses at least 16px font sizing. Tumblr's post small font is 13px which is below the standard. The regular font however fits.
Don't make important links or link context like text appear on hover. A mobile device can't see it. Someone who is keyboard only can't either.
Again this isn't comprehensive, but it will give you a start. This is to help be more inclusive with your replies and blogs. This isn't to shame anyone for their aesthetics, but to point out things we can all do to make the RPC more accessible.
What if I like my aesthetics and don't want to change?
That's fine. Just understand it means fewer people can read, process, or comprehend your writing. Better yet if you don't want to switch and instead compromise? Make it very clear in either your rules, pinned post, carrd, etc that you will absolutely switch to regular formatting upon request.
This will help bridge the gap that people with fewer spoons to reach out over this will feel more comfortable doing so.
At the end of the day when we make our replies and RP blogs accessible for those who need it, we make it more accessible for everyone.