Display substrate, display panel and display apparatus having the same, and fabricating method thereof

A display substrate having at least a first region corresponding to a subpixel of a first color, a second region adjacent to the first region and corresponding to a subpixel of a second color, a third region adjacent to the second region and spaced apart from the first region by the second region on one side, the third region corresponding to a subpixel of a third color, and a black matrix region outside the first region, the second region, and the third region, comprising:

• a base substrate;
• a black matrix on the base substrate and in the black matrix region, the black matrix comprising a plurality of rows and a plurality of columns intersecting each other;
• a first color filter layer having a net structure with a plurality of openings, and comprising a first portion in the first region and a second portion in the black matrix region, the first color filter layer substantially covering the plurality of columns of the black matrix;
• a second color filter layer in the second region;
• and
• a third color filter layer in the third region;
• wherein the second color filter layer and the third color filter layer are both in the plurality of openings, and are respectively spaced apart from the first color filter layer;
• and
• a first height of a surface of the first portion away from the base substrate relative to the base substrate and a second height of a surface of the second portion away from the base substrate relative to the base substrate are within 30% of each other.