Why in one jail do some dudes get to wear orange and others wear brown or blue?

The following, which details some of the variations within the Tampa Bay area, [ Note the first 3 lines detailing the three colours that you mention ]:

“… Federal prisoners: Tan button-up shirts; tan pants. Florida state prisoners: Blue v-neck shirts; blue pants. Florida death row prisoners: Orange v-neck shirts; orange pants. Pinellas County prisoners: Orange, green, blue or gray v-neck shirts and pants. Pinellas prisoners working outside jail: Orange v-neck shirts; orange pants. Pasco County prisoners: Orange, blue, red or white v-neck shirts and pants. Pasco prisoners working outside jail: Black and white striped shirts and pants. Hillsborough County prisoners: Orange v-neck shirts; orange pants. Hillsborough prisoners working outside jail: Orange and blue two-tone (not striped) shirts and pants. Hernando County prisoners: Khaki v-neck shirts; khaki pants. Hernando prisoners working outside jail: Red T-shirts; brown work pants. Citrus County prisoners, male: Orange v-neck shirts; orange pants. Citrus County prisoners, female: Red v-neck shirts; red pants. Citrus prisoners working outside jail: Blue v-neck shirts; blue pants. …”

is quoted from http://funadvice.com/r/14oqfppev3i

Hope you are not planning your wardrobe for a prolonged stay !

– Best wishes - Majikthise