Color bar and Ideological barrier

Color bar noun - Barrier preventing blacks from participating in various activities with whites.

Ideological barrier and color bar are semantically related. In some cases you can use "Ideological barrier" instead a noun phrase "Color bar".

Ideological barrier noun - A barrier to cooperation or interaction resulting from conflicting ideologies.

Color bar and ideological barrier are semantically related. Sometimes you can replace phrase "Color bar" with "Ideological barrier", this phrases are similar.