Sentence:  Now , Adam , in the <WSD>gray</WSD> light of afternoon , stared across at the hut opposite his tent , and thought of Simms Purdew lying in there in the gloom , snoring on his bunk , with the fumes of whisky choking the air . 
Meaning of the word marked with <WSD> tags:  a neutral achromatic color midway between white and black