Yes. Using coloured keys to help enable recognition there are keyboards which can be a boon to a user that suffers with Dyslexia.
With a design based on guidelines from The British Dyslexia Association here is a good example
Not every keyboard suits every user, and that’s exactly why this range exists. Our assistive keyboards, from Geemarc, Shortboard and Accuratus, are chosen to help users with visual, motor or cognitive needs interact with a computer more comfortably and independently.
Look out for features such as high-contrast or large-print keycaps for users with visual impairments, simplified or reduced-key layouts for those who find standard boards overwhelming, programmable keys for single-switch or custom input needs, and lighter-touch mechanisms for users with limited hand strength or dexterity. These features turn up across education, healthcare and home settings wherever independent computer use matters.