Two Cossacks are sitting on a bench, enjoying a smoke. They both have strong features and rugged looks. One is bald and the other has a short, cropped haircut. Dressed in traditional Cossack attire - leather boots, trousers and vests - they look ready to take on any challenge. To make the two men stand out from their surroundings, try highlighting the leather portions of the boots, trousers, and vests with a burnt umber or something more eye-catching such as a bright red. For the faces and hair, use a combination of yellows and greys for the bald Cossack and browns and ivories for the other. The clouds of their smoke can be light greys and whites. The background can also be a shade of yellow or something that resembles the morning sun. You can try various shades of yellow or use background colors like bright blue and deep green to bring the characters to life.