We report the detection of a very red source coincident with the gravitational lens 1938+66.6 ( Patnaik et al .
1992 ) in K ^ { \prime } ( 2.12 { \mu m } ) , H ( 1.6 { \mu m } ) , J ( 1.25 { \mu m } ) , and Thuan-Gunn r ( 0.65 { \mu m } ) bands .
1938+66.6 has previously been detected as a partial radio ring indicating lensing .
We find K ^ { \prime } = 17.1 \pm 0.1 and r = 23.9 \pm 0.2 , making it a very red source with ( r - K ^ { \prime } ) = 6.8 \pm 0.25 .
We also observed in Thuan-Gunn g band ( 0.49 { \mu m } ) and found g > 24.5 at the 90 % confidence level .
We interpret our observations as a reddened gravitational lens on the basis of its optical-IR color and positional coincidence with the radio source .