Create a design for the number '67' where the structure of the numbers themselve

Create a design for the number '67' where the structure of the numbers themselves incorporates elements of the Petronas Twin Towers. The design should make the digits '6' and '7' appear as if they are formed from the architectural lines of the towers. You can use the vertical lines of the Twin Towers to shape the borders of the numbers, with the spires of the towers integrated into the tops of the digits, making them look both like numbers and reminiscent of the Twin Towers. For colors, consider using cool tones like gray and blue to mimic the glass and steel of the towers, adding a modern feel and a strong connection to Malaysia. The overall design should focus on smooth lines and harmonious structure, ensuring that the number '67' immediately evokes the image of the Petronas Twin Towers."