thank you anon! i believe there is an easier way of doing it on photoshop, but this is how i do it on sai
it’s not really a brush setting and it’s done through a couple of easy steps
first select the text (using the magic wand tool)
then go to “selection” and choose “increment (1)”
do this step as many times as you want depending on how thick you want the border. in this case i did it 3 times.
make a new layer under the text layer
fill it with whatever color you want
you can change the colors around using the “preserve opacity” tool which is found above the layer box
and there you go!!