Hex #629c90 or rgb(98,156,144) in RGB space is the tint of greenish cian. It has hue angle of 167.59 degrees, value = 61 and saturation = 37. #629c90 can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of blue, 4 drops of green, 4 drops of white.
Nearest safe hex - #669999. Below you can see the block with #629c90 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #629c90 to the mixer and play with it.