Hex #b1bb3b or rgb(177,187,59) in RGB space is the tint of yellow. It has hue angle of 64.69 degrees, value = 73 and saturation = 68. #b1bb3b can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of red, 4 drops of green, 3 drops of white.
Nearest safe hex - #99cc33. Below you can see the block with #b1bb3b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #b1bb3b to the mixer and play with it.