Providing predictable and customizable electronic color mixing

In a digital medium environment for manipulating digital images, a computer-implemented method of mixing digital colors, comprising:

• detecting a selection of a first reference RGB color;
• detecting a selection of a second reference RGB color to mix with the first reference RGB color;
• determining a mixing ratio of the first reference RGB color and the second reference RGB color;
• querying at least one predefined mixing table based on the mixing ratio;
• identifying from the at least one predefined mixing table a mixed output RGB color representing a mixture of the first reference RGB color and the second reference RGB color;
• and
• providing the mixed output RGB color.

A system for mixing digital colors comprising:

• a memory comprising a mixing table indicating a mixed output RGB color for each pair of eight primary RGB colors;
• and
• a computing device comprising instructions thereon that, when executed by at least one processor, cause the system to:
• define a first reference RGB color as a first set of weights of the eight primary RGB colors;
• define a second reference RGB color as a second set of weights of the eight primary RGB colors;
• determine an output RGB color corresponding to a mixture of the first and second reference RGB colors based on the mixing table and the first and second sets of the eight primary RGB colors;
• and
• modify a digital image using the output RGB color.