If you suffer from colour vision deficiency or dyscalculia, you can deactivate all tasks that are limited by this with a single click. They will then no longer be suggested in your training plan.
To select a pre-restriction such as dyscalculia or colour vision impairment, simply click on your email address in the top right corner of the website, then click on "Personalisation", scroll down to the "Special Needs in Training" setting and select the appropriate option to disable specific exercises in the training.