Hex #6a91a3 or rgb(106,145,163) in RGB space is the tint of bluish cian. It has hue angle of 198.95 degrees, value = 64 and saturation = 35. #6a91a3 can be obtained by mixing 4 colors: 4 drops of blue, 1 drop of green, 5 drops of white, 2 drops of black.
Nearest safe hex - #669999. Below you can see the block with #6a91a3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6a91a3 to the mixer and play with it.