Above us, the sky had deepened to an indigo that would soon be violet.

The sky was deepening to its daytime lapis in the east.

The evening wore on and the sky deepened in color, unveiling the stars.

The sky was deepening, and I was anxious to go home.

Far above, the sky deepened steadily, from blue to indigo.

As they talked, the sky deepened to a darker gold.

Through the haze of rain she could see the sky was deepening into dusk.

Above the roof of Sundays house the sky had deepened to indigo.

Beyond the hospital window, the sky above the city deepened into dusk.

The clouds were clearing, and the sky was deepening to a clear blue-black.