Photometric properties and statistics of BL candidates. Panel a: absolute Gaia CMD of the 133 BL candidates. Panel b: distribution of the number of BLs and the cluster mass. The points are colored according to cluster age. The dashed line shows the upper limit on the number of BSSs for a given cluster mass, and it is taken from Jadhav & Subramaniam (2021, Eq. (1)). The four BLs in the globular cluster NGC 362 were assigned an age of 13 Gyr in panel a for visual convenience.