Hex #ef5535 or rgb(239,85,53) in RGB space is the tint of orange red. It has hue angle of 10.32 degrees, value = 94 and saturation = 78. #ef5535 can be obtained by mixing 4 colors: 5 drops of yellow, 5 drops of red, 5 drops of magenta, 1 drop of green.
Nearest safe hex - #ff6633. Below you can see the block with #ef5535 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #ef5535 to the mixer and play with it.