<human>: How do you do this: To make a color of oil paint darker,

OPTIONS:
- squeeze equal amounts of the original color and a lighter color onto a palette, and mix them with a palette knife blade, adding more of either color to adjust the shade.
- squeeze equal amounts of the original color and a darker color onto a palette, and mix them with a palette knife blade, adding more of either color to adjust the shade.
<bot>: squeeze equal amounts of the original color and a darker color onto a palette, and mix them with a palette knife blade, adding more of either color to adjust the shade.