Hex #667155 or rgb(102,113,85) in RGB space is the tint of olive. It has hue angle of 83.57 degrees, value = 44 and saturation = 25. #667155 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 1 drop of white, 2 drops of black.
Nearest safe hex - #666666. Below you can see the block with #667155 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667155 to the mixer and play with it.