Hex #335f66 or rgb(51,95,102) in RGB space is the tint of bluish cian. It has hue angle of 188.24 degrees, value = 40 and saturation = 50. #335f66 can be obtained by mixing 3 colors: 1 drop of red, 2 drops of cyan, 2 drops of black.
Nearest safe hex - #336666. Below you can see the block with #335f66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #335f66 to the mixer and play with it.