Yes, the colour tones within the same product range can be mixed to any ratio.
For example, Polyx®-Oil Tints 3072 Amber can be mixed with either 3075 Black to darken the shade, or alternatively with 3040 White to lighten the shade.
Additionally, Osmo Wood Wax Finish, Country Colour and Natural Oil Woodstain can be mixed to any RAL or NCS colour tone as well as any of our historic/discontinued colour tones can be specially mixed, with an applicable mixing charge and a 2-3 week delivery time.