Tinting Strength of Colors
All colors have a different tinting strength. For instance on our palette yellow have the least tinting strength you will need more yellow(about 2/3 more than red to get an orange mixture . Now I don’t want to start getting into recipes just note you will generally need more yellow. Blue is higher in tinting strength than red in general. A word of caution our green blue has the highest tinting strength of any color the palette you will normally use ten times less Thalo blue to a mixture or less so for a green it would be 10 to one: 10 parts yellow to one part Thalo blue(green blue) a little of this blue goes a very very long way.
Just in general to get a feel for what I am saying about tinting strength or portions of color, lets talk about creating grays with black and white, to get a #6 on the value scale you can usually mix equal parts white and black, to mix a step# 7 you need to add 4 parts white to 1 part black, to mix a step #8 you may need to add 16 parts white to 1 part black, to mix a step #9 you may need to mix 40 parts white to 1 part black to get to step 10# you may need to add 100 parts white or more to 1 part black. You should see that as you go higher up the value the amount of white needed doesn’t just double or even triple it rises quickly the higher you make the value. This tinting strength principle applies in general to any paint color. if I have a red that is a #6 on the value scale and I want to make it a #10 I could need as much a 100 parts white to one part red.
This is something to be aware I have seen students going through all the right steps to get a certain color only to forget this principle. They end up fighting to get a light gray a number #9 or something on the value scale. Normally they have this huge puddle of gray and they have used up their white puddle and their mixing puddle is a step #7 needing to lighten but 2 steps in value. I sit down squeeze out more white take a pea sized bit from their color puddle and add 6 to 7 times as much white and there is the color they needed . What went wrong is there wasn’t enough white in their mixture. To try and make the entire puddle light enough I would have had to add a 150ml of white to their puddle to make it light enough but instead I took just a bit from the original mixing pile so I could add the needed amount of white to get the right mixture .
The best way to avoid burning through more paint than you are prepared to use try this method of keeping in mind the tinting strength of your paint and you will be able to control the accuracy of your color mixtures but you will also control how much paint you use. Further this is a tip to help your control your color mixtures even better.
Start with the color you need for the color mixture to be or the value you need it to be so if I am painting a sky and I need a light blue I will start be pulling out a small pile of white paint. Then I add small bits of blue to that white until I have the value of light blue I want if I need to make the blue greener or more violet add small bits of green or purple to shift the hue it shouldn’t take much the value shouldn’t shift much unless you are adding a very dark blue even then a small amount of white will lighten the value of the mixture to where you will need it. If you are creating a dark mixture start with your dark color and then lighten it as needed with lighter colors to control the value shifting the hue and chroma as needed this will help you control your color mixture much easier. So always remember the tinting strength of the paints you use.