 
     vec3 upperblue_color = vec3 (12.0, 43.0, 80.0);
     vec3 blue_color = vec3 (22.0, 77.0, 142.0);
-    // vec3 lightblue_color = vec3 (75.0, 145.0, 159.0);
     vec3 lightblue_color = vec3 (62.0, 134.0, 142.0);
     vec3 dirtyblue_color = vec3 (105.0, 142.0, 137.0);
     vec3 dirtyyellow_color = vec3 (170.0, 142.0, 85.0);


    // Calculate dummy blue gradient sky color
    vec3 high_noon_color = vec3((theta / PI)-0.2,(theta / PI)-0.1,1.0);
    color = high_noon_color;
    color = sunset_color / 255;
}


    float z = unit_vector.z;

    float upperblue = 1.0;
    float blue = 0.729;
    float lightblue = 0.459;
