frankraney Loc: Clovis, Ca.

Okay, I can't get my painter to mix the color that I want. It keeps coming up different. I understand now that in paints they use the red yellow blue primary they subtractive system, which is different than what we use in photography RGB.

Now my question. How can I convert from RGB to ryb, or is it even possible in Lightroom or photoshop I don't see a way. Or does anyone know of a conversion program if I get the color that I want in RGB how can I convert it to red yellow blue.

Thanks in advance for your help.

CHG_CANON Loc: the Windy City

I believe it's a PhotoShop option only, not enabled by LR. If you google the "how", including Photoshop, you should get the proper instructions.

burkphoto Loc: High Point, NC

The very first issue in the mix is your monitor. How do you know your RGB monitor isn't lying to you? You have to calibrate it with a spectrophotometer or colorimeter, and then profile it for the computer operating system, so the system can match color in files to the capability of the monitor so you see the correct color (or the closest simulation to it). That is an absolute necessity for printing anywhere near accurate color reproductions of your files.

Assuming your monitor is calibrated and you have tested and proven that you can PRINT the color you want to match, take it to your paint store and have them read it with a spectrophotometer. They should be able to come close to it.

Matching RGB with CMYK or even CcMmYyKkOGR (or some high end ink set) is hard enough. But the world of pigments in paints is different from the world of pigments in photography and the graphic arts. Some color gamut mismatches are inevitable.

frankraney Loc: Clovis, Ca.

Thanks Paul, I'll try again I did that but didn't see anything it's usually what I do so I will try again.

frankraney Loc: Clovis, Ca.

Burk. Everything you say is true. Basically what I want to do is once I get the color I want an RGB is convert those numbers to the red blue yellow and then give those numbers to the paint mixer and they'll mix a sample for me if it's not right at least we're going to be awful close I think and Hope.

What I want to do is I have a front door that's been stained red oak which shows the grain. The outside of the door has been facing the Sun and it's beaded up and it needs to be redone. I have my house on the market and got an offer in on another one so all I want to do is paint the front of the door or the outside to make it look good but be close to Matt and color to match the inside or the stained part. And the painter mitcher keeps giving me stuff that's in the pinks. So what I want to do is want to once I get the color that I want in RGB is just a converted for them and try that. Because I tried printing a picture of what I wanted and they got their scanner that feeds their software into their computer and they put on top of it it scans the picture and converts that to the red yellow blue and it doesn't match. Maybe I'm being too picky I don't know maybe I should just get a light brown and be done with it.

BebuLamar

I don't think there is RYB. Red, Yellow and Blue don't work. It would be CYMK that is Cyan, Yellow, Magenta and with the K for Black added. The black is needed because CYM together don't make good black.

burkphoto Loc: High Point, NC

If I were doing this, I'd just go to the paint store, get all the paint sample chips that they have that are close, take them home, and see which one comes close to a match. OR, if I had a piece of wall board or wood with the color on it I need to match, I'd take that in and let them read that. I know that works.

frankraney Loc: Clovis, Ca.

Thats beginning to look like what I will do.......i just like an easy challenge, but I don't think so while trying to move.

frankraney Loc: Clovis, Ca.

RYB is what is used in paint blending. Artist use it also. I don't know why because the human eye sees RGB, but paints are mixed in RYB

Peterfiore Loc: Where DR goes south

RGB is the Primary color palette of light. RYB is the Primary color palette of pigment. All other colors are mixed variations of their respective primaries.

frankraney Loc: Clovis, Ca.

Yes. That is started above. What I was hoping for was an app to convert, but so far none. At least nothing short of engineering.


I give up. There are no apps or programs. I'm just going to paint any color close to what I want. Thanks for your help.

TriX Loc: Raleigh, NC

Or you could take the door to the paint store. I actually had to do that to match the black color on some (large) wooden shutters on my house. Painful, but after a number of different trips and trials without success, it was the only option (they couldn’t seem to get it correct from a paint chip)

frankraney Loc: Clovis, Ca.

Same problem I'm having. They can't get it right. I'm just going to go with something close. I'm done trying. There are mathematical ways to convert, but way over my old head.

jscorbin Loc: Woodinville, WA

Datacolor makes a little gizmo called ColorReader for measuring paint color. It measures the color on existing surfaces, and creates a paint mixing specification (also in any color model you want) that is calibrated for different paint brands. I have the ColorReader EZ that is currently on sale for $39, and it works well. The associated software also provides a variety of color palettes and complementary colors for trim, etc. https://www.datacolor.com/colorreader/products/

frankraney Loc: Clovis, Ca.

That's what the paint store was doing. But the color kept coming out pink, not tan. Today they got it finally.