Hex #2b636a or rgb(43,99,106) in RGB space is the tint of cyan. It has hue angle of 186.67 degrees, value = 42 and saturation = 59. #2b636a can be obtained by mixing 3 colors: 2 drops of red, 5 drops of cyan, 5 drops of black.
Nearest safe hex - #336666. Below you can see the block with #2b636a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b636a to the mixer and play with it.