What to wear to Colours of Ostrava: Ostrava sits at 25°C (77°F) by day and 14°C (57°F) at night in July, on industrial site, with a moderate chance of rain. That means a light base with one warm layer you can carry, cushioned trainers or a low boot, and a bag small enough for the gate rules. The crowd leans indie, industrial and boho, so anything that survives the day reads as right.
Women's outfits at Colours of Ostrava have to clear the same three hurdles as everyone else's. 25°C (77°F) by day, 14°C (57°F) at night, industrial site underfoot, with more options for solving them.
The dominant aesthetics at Colours of Ostrava are indie, industrial, boho and camp-practical. That is the visual language of the site, the stages, the merch, the crowd photos, and outfits that speak it look intentional rather than borrowed.
There is no enforced dress code. What the crowd rewards is a look that survives 4 days of industrial site without you having to protect it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset; the same jacket every day, because it lives in the tent and does everything.