Modern usage is almost entirely in compounds: 殷勤 (yīnqín, attentive), 殷切 (yīnqiè, earnest), 殷实 (yīnshí, well-off). The character also has a second reading 殷 (yān) meaning 'dark red' — rare, mostly literary.
history
殷 names the late phase of the Shang dynasty (c. 1300–1046 BCE) after the capital moved to Yinxu 殷墟 in modern-day Anyang, Henan — the site that produced the oracle bones (甲骨文) on which our knowledge of Shang Chinese rests.
