Hex #4e90a4 or rgb(78,144,164) in RGB space is the tint of bluish cian. It has hue angle of 193.95 degrees, value = 64 and saturation = 52. #4e90a4 can be obtained by mixing 4 colors: 2 drops of blue, 3 drops of cyan, 4 drops of white, 4 drops of black.
Nearest safe hex - #669999. Below you can see the block with #4e90a4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4e90a4 to the mixer and play with it.