private Color GetButtonColor(FieldData fieldData, int x, int y) { var cellDataIndex = fieldData.GetCellDataIndex(x, y); if (cellDataIndex == -1) { return(Color.white); } else { var result = Color.red; if (editingCellIndex == cellDataIndex) { result.r += 0.4f; result.g += 0.4f; result.b += 0.4f; } return(result); } }