Desk Chair (Granton EH5)

Will be spending a lot of time at my new desk with my new technology (hoping to start a specialist business) so I’m in desperate need of a chair- not too keen on standard swivel chairs as they can be uncomfortable on my body (I have complex health issues.) I would even consider a smaller arm chair. Preferably darker colours (greys, black, mustard etc.) Thanks for reading and Happy Holidays to you and your loved ones!