How to sign: having a color similar to that of a clear unclouded sky
"October's bright blue weather"- Helen Hunt Jackson; "a blue flame"; "blue haze of tobacco smoke";
Similiar / Same: bluish, blueish, light-blue, dark-blue, blue-black
How to sign: low in spirits
"lonely and blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted";
Similiar / Same: depression, downhearted, down in the mouth, low-spirited, dispirited, downcast, depressed, down