How can I make my textures smoother?

Hello, I’m making UI for my game. I’m using Inkscape for making textures for widgets. When I import an image and open it in UE, it becomes pixelated and on screen it looks really bad. I tried to increase DPI (from 200 up to 800) but it didn’t help enough. I’ve turned off texture filter, but It doesn’t help and also mixes colors.
Here’s the image in Inkscape



That’s when I import it


image
Texture with filter on