Hex #148e90 or rgb(20,142,144) in RGB space is the tint of cyan. It has hue angle of 180.97 degrees, value = 56 and saturation = 86. #148e90 can be obtained by mixing 4 colors: 1 drop of red, 5 drops of blue, 4 drops of cyan, 3 drops of green.
Nearest safe hex - #009999. Below you can see the block with #148e90 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #148e90 to the mixer and play with it.