Hex #1c645f or rgb(28,100,95) in RGB space is the tint of cyan. It has hue angle of 175.83 degrees, value = 39 and saturation = 72. #1c645f can be obtained by mixing 3 colors: 1 drop of red, 5 drops of blue, 3 drops of green.
Nearest safe hex - #336666. Below you can see the block with #1c645f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1c645f to the mixer and play with it.