How do you translate from RGB to RYB?

Question

Anyone know how to translate RGB (computer screens) to RYB (primary colors).

I am dyeing fabric for a friend and she wants a specific color, but only has it on her computer.

Answer 1

RYB is an incorrect color scale that muddies colors.  Pigments are mixed with CMYK which is very similar.  C=Cyan or light blue M=Magenta Y=Yellow and K=Black.  Here is a website that will convert the colors for you.  When you enter your RGB numbers into the correct section and press the "go" button (not really sure what to call it, they have it labeled really funny, but you'll know what to do)  your answer will show up in the CMYK section  above.  CMYK is based on a percentage scale so 1.000 will be 100% of whatever color and something like 0.654 would be 65.4%  Good luck with figuring out your mixtures.  

If you have access to lots of different color dyes you need to find the best matches to the CMYK scale available.  If you dont have lots of options you will want to test and modify your mixture often before dying the final fabric piece.  

If you can compare your dye to paint...high quality paint matches are as follows (NOT the cheap wal-mart paints, look at a good craft store in either the acrylic that comes in a tube (like toothpaste) or oil paints):

Cyan: Cerulean Blue Hue

Yellow: Cadmium Yellow Light

Magenta: Alizarin Crimson

Black: Mars Black

I know those sound like really random colors but are very popular paint names and as long as you can find something close it will be a good comparison for your dyes.  Color scales are very persnickety (they fail easily if you choose the wrong colors to mix).  The CMYK you see at the website I sent you to is made with light colors and is not the same as printing.  But that's another story.

GOOD LUCK

Answer 2

you can try a colour conversion software like this one;

http://www.annystudio.com/software/color...

I haven't used it but looks like it might be useful.

Also it might be better converting to CMYK , the default primaries for print.

also, you will need to take into account the way the fabric your using will alter the end result. it may pay to do some test dies first.

Answer 3

Best thing to do is to go to a hardware store like Lowes, OSH, or Home Depot and asked the paint shop the correct numbers on the color shade you want.

Answer 4

Just convert the file to CMYK mode.  This will introduce the black component, then, in whatever application you do this in, just dial down the black (K) to zero.  This may change some of the colors, but that is the nature of working with pure red, yellow and blue.  But, if you want to retain the same colors you see on the monitor, you may have to introduce black dye to get the mix right.

Be aware that getting an EXACT color match with any pigments, to the colors on the monitor is VERY difficult.  Agencies and print shops spend thousands of dollars calibrating their monitors to their printers.