Hi @sanderedk,
Due to the higher resolution in smaller devices like mobile and tables, the quality of regular image we upload gets low. To render the better quality of images you need to upload the images with dimension 2 times to 3 times bigger than a regular. For example your current logo width is ‘260px’ and height is ‘100px’ so you need to upload an image with width ‘780px’ and height ‘300px’.
after uploading the image please paste the below custom css code in Appearance > Customize > Additional CSS to set the image width to 260px on preview.
.navbar-brand {
max-width: 260px;
}
Thanks