Change text colour only for mobile on a specific text block

Hello, I am trying to make the two text boxes here a grey colour (#535353) but only for mobile so it is more legible.

However, I have no idea what I'm doing wrong here. This code does work for other parameters such as padding etc, but it doesn't seem to change the colour. Not sure what's going on.

Any ideas?

https://sketchedin.co.uk

text-color is not a valid CSS property. You want something like the following.

#block-a2885b7c4ffa74a4c11d .sqsrte-text-color--white {

  color : #535353;
  
  }

Let us know how it goes.

this worked perfectly! thank you so much.