Hex #1c587b or rgb(28,88,123) in RGB space is the tint of bluish cian. It has hue angle of 202.11 degrees, value = 48 and saturation = 77. #1c587b can be obtained by mixing 4 colors: 5 drops of blue, 1 drop of green, 1 drop of white, 2 drops of black.
Nearest safe hex - #336666. Below you can see the block with #1c587b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1c587b to the mixer and play with it.