Type doesn't look perfect in web graphics
I'm making some web graphics. They are 768px wide, which is what the website calls for; they are saved as 1X pngs using "Export for Screens".
The type in my graphics (black on white) is noticeably mushier than the crisp black type of the surrounding headings and copy on the webpage.
Any suggestions as to things I could try to improve it? I'm using the same fonts I would use in a print project.

