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I was lazy and pasted my answer in the digi thread here.:D
It can be done in theory, and imo you can get pretty close when you break a colour down in photoshop for instance. If you are doing your mock up in PS, you can colour pick a simplified colour palette to mix for your painting.
Remember the colour you see on your monitor may not be the exact same colour you mix using cymk. The luminosity that comes from a glowing or backlit screen will be hard to duplicate in paint, oils seem to be good at producing light effects with glazing, also airbrush techniques help with light in acrylics.
You should definitely research as much as you can about colour theory and the colour wheel so you can better handle colour shift, and using opaque rather than transparent colour will help minimize colour shift.
One thing I don’t know if you have calibrated your monitor yet, and are using colour profiles? This will help you see and mix colours closer to what it should look like on your monitor or in prints. An un-calibrated monitor will show you colours that may be wildly different to the actual hue you are after, and vice versa, this should be a first step in colour matching digital/analogue.
Here is a link to a page that shows formulas for cmyk, there are also similar pages with RGB formulas.
http://www.december.com/html/spec/colorcmyk.html
This is another link with yet another colour mixing object. A little heady but interesting, thanks J4J Paul for the links.
http://www.colorcube.com/articles/mixing/mixer.htm
Good Luck
Regards, T.S. HA'O
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My First Post, but long time troll.
I hate giving advice that actually costs something to whomever is looking for a solution. But, I have looked long and hard for an answer to this question (mixing palette colors from the screen). Other than the usual read-up-on-color theory, mix, mix, mix, and look deeply into the colors in their natural setting (to find yellows in highlights, and alizarin crimson in shadows under birds on beaches) I have found one solution which I used for a short time as an aid to my self study. It really helped me make sense of things as I had no time or money to be in a course and learn from an instructor. My teacher was the Internet and Wet Canvas. :thumbsup: Once I felt I could duplicate colors fairly easily I was happier with freely interpreting my colors from true life or photographs I took on location. I was then able to instill emotion into my pictures. The theory part will really help you bring your viewer into your scene and retain them there. It is not only the color. But, here is a great tool. Please don’t rely on this as it will become a crutch. Be creative and have fun.
Nevertheless, here is the solution. It will cost you money after 30 days if you want to retain it, but otherwise it will be FREE. Make sure you have the time to devote to this tool if you want to learn how to mix in 30 days without paying for it. So here goes.
The way I used it was to read up on color theory, practice mixing, posturize my photos in Gimp (aka the Free Photoshop) to gain a better understanding of where my basic colors lay, and finally I desaturated my posturized images to better train my eye to mix values. I also practiced only painting in values and then glazing/scumbling to gain a foothold into composition, depth, and deeper richer colors (Like deep ocean waters or a folding wave). [(Note: You can change the BW values as long as you keep their relationships intact. So if you posturized (setting of ~10 or 11 will give you the +9 values)], When you desaturate the image you will have ~6-7 grayscale values (I prefer to desaturate as you can still tweak the colors to give it the colors needed for the underpaintings of the French and Italian masters.) You will then be able to alter the +2 value to +4 for a lighter picture, but the next values on your photo which were +3 must also be shifted to +5 to have the same overall picture in the end only altered to help your personal mixing style.)
But, to actually answer your question:
You can interpret screen colors with the software called Artworks. It has a module which allows you to see the Hue, Value, Intensity, R, G, B, X, Y, But more importantly it has the pigment numbers according to industry standards, AND a method for mixing the colors from the names of those industry standards which you will know as the names on your tubes of color. It will tell you which color to mix into which and what value to bring that up to in order to obtain the color you see on the screen. So Pthalo Blue is called PB with the pigment type as 15. It will then simply tell you PB15. If what your pointer is on is a mix of colors then it will tell you what’s needed to mix it. for the simple Pthalo Blue example. It will display; Hue(Blue, Pthalo Blue, PB15) Values Scale(8) Intensity(MEDIUM). Another more complex Example: Hue(Orange 8) Value(3+)(31%) Intensity(Mid2)(32%) Pigment Reference: (PO43) In Order To Mix This Hue: (Magenta into Yellow until 08 or Simply use Cadmium Orange) Value Scale(5+) Intensity(Medium) R(117) G(72) B(33). As you can see it will tell you how to mix your colors from a simplified palette. But, also tell you when you can simply use a premixed tube like Cad Orange at a value of +5. There are a bunch more tools like this within the program. It lets you separate all the values independently and show them as layers. So you can see everywhere that there is a +5 value on a grayscale underpainting. You can also isolate by hue (only 6-7 main hues), and you can see how contrast fits in the picture (dark background vs. light background. When you purchase their software they will send you a color wheel (I think it is now 32 colors with values on it) that matches things by complementary hue, and a grayscale value chart to help you match what they tell you (like +8) to what you are actually mixing on your palette.It is distributed by the company called artellmedia (found at http://www.artellmedia.com ).
The download link for the 30 free trial is here: http://www.artellmedia.com/download.html ).
Price for USD is (~$50) (http://www.artellmedia.com/order_artworksbasic_usd.html) (Note: they have the currency for other countries also on their site.
Small blurb online of how this part of the program works, although I explained in much more depth then this blurb. I recomend just rying it for free for a month and see if you improved enough to wobble on your own for while. If not then I recommend more practice before actually purchasing. If you have color deficiencies or an absolute horrendous time mixing your colors then by all means purchase this product.
Blurb on Interpreting Screen Colors
http://www.artellmedia.com/artworksb1.html
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