Hex #b45b5b or rgb(180,91,91) in RGB space is the tint of red. It has hue angle of 0.00 degrees, value = 71 and saturation = 49. #b45b5b can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of red, 4 drops of magenta, 5 drops of blue.
Nearest safe hex - #cc6666. Below you can see the block with #b45b5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #b45b5b to the mixer and play with it.