Hex #1a5a67 or rgb(26,90,103) in RGB space is the tint of bluish cian. It has hue angle of 190.13 degrees, value = 40 and saturation = 75. #1a5a67 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 3 drops of green, 1 drop of black.
Nearest safe hex - #336666. Below you can see the block with #1a5a67 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a5a67 to the mixer and play with it.