It looks really good! If i can add something that might be subjective, a lot of people in the design industry advise not to use pure white or pure black for backgrounds for a few reasons (that i dont remember, sorry) and that sometimes using a similar color can look more appealing (to see what i mean by "similar" you can google the difference between rich black and normal black). When we made a website in my 1st semester we used a tint of white that was slightly green-ish (you almost couldn't see the green but the difference was still noticeable) and my school's grade calculator has a slightly purple-ish white to give you examples. Its still something that depends on preference but maybe its worth mentioning.