Some of our members have vision problems that make certain coloured texts uncomfortable to read. It seems to be the very light and very bright colours that trouble people, so please be mindful of this if you wish to prettify your posts. Sticking to black avoids all possibility of problems.
The relevant part of the Guidelines is

Clare
The relevant part of the Guidelines is
Thank you!Please do not use coloured fonts in your messages. Your snazzy orange or yellow text just disappears against this background. In addition, the black text helps those who may be colour-blind or partially sighted participate fully in the forums too.
Clare