7 Colors is a logical game for two players. The rectangular board consists of rhombs of 7 colors. At the beginning of the game players occupy two opposite corners. Players make moves by turns. A player can change her/his color, which re-paints all the occupied rhombs. If the chosen color coincides with the color of an unoccupied rhomb in the closest neighbourhood, that rhomb goes to the player. A player wins when she/he occupies more than half of the board.
7 Colors is shareware. It costs US$12. You can try it for free for one month, after which saving games, as well as two most advanced levels of the game, will be disabled.
More info here.