RGB to CMYK

How do you successfully conver RGB to CMYK without changing the colors? I find that when I convert my RGB file, it looks much duller in CMYK code.. can you use bright colors in CMYK?

Thanks

 

I'll reply in a minute with the answer. I gotta restart my computer to be able to run photoshop cuz it wants to finalize updates.

 

Try this tool http://web.forret.com/tools/color.asp .

 

Actually, I really don't know. It looks like that webite that mirturk posted will help, hopefully. What is the use/function of the CMYK color functon?

 

I did change the RGB to CMYK function, however the colors look different:



(CMYK on the left, RGB on the right)

As you can see the CMYK is much less saturated apparently I can fix this by adding a custom CYMK (in photoshop edit > color settings) but then I don't know how to go on from there..

Thanks

 

actually I guess the CMYK is for printing right?The real colours will showed up after you print that image..my lectures said that to me

I've used CMYK to print all my assignments and print works..no prob at all..but, why do you want that?RGB to CMYK?

 

Yes it's for print. So what I see on my monitor will be what I see on print.

I should rephrase:
I want to try to emulate the same color that I have in RBC to CMYK (make it a bit brighter and more vibrant) Is it possible?

 

owh..like that. you want to make it more brighter

I'm sorry, I think that's impossible..or maybe you should try asking the Adobe staff and support?

 

I think it's somewhat possible by customizing the CMYK...

Hey I see prints outside that use bright colors!

Anyways, it's a bit too tedious so I might just go with silver instead of green...

 

With CMYK what you see on screen is not what's going to print. CMYK scale is for printers not for monitors. It looks a little odd on screen because it is no longer in RGB mode. Just print the image and will be fine.

 

Really?

So if I convert RGB (what I see on the monitor) to CMYK. How it looks like on PRINT will look the same as how I see it in RGB?

 

Try using Pixie:

http://sitefever.com/looking-for-a-specific-color-try-pixie/

 

To get the fluro green color on print, you need to ask your printer to use special pantone colors, pantone colors cost a lot more to produce, then normal CMYK colors.

Your monitor can uses a combination of red green blue, where as printers use a overlays of Cyan Yellow Magenta Key(black) to product your prints.

 

I have the same problem, if i use an eyedropper to get the same color as something in CMYK its a different color than the actual thing.

 

This is because the monitor is sending light out at your eyes and a printed page is reflecting light off a page. So what makes up white and black are completely opposite: in lighted colours, all the colours (255) equal white, while in print, all colours together give you black (or, a really icky dark brownish ew, which is why there is also black (K) ink seperately).

Pantone colours are more to make sure that if you use one colour, you can find that exact colour again by looking up the Pantone number... yes Pantone is expensive because it's propriatary (owned).

You want to change the image into CMYK (like you did) to see what it looks like. There IS a list out there somewhere (but I dunno if you have to buy it) of comparable cymk colors (in numbers, if it's Pantone numbers you will pay) from rgb. There are some general rules which printers know, like that 100% blue on a screen ends up looking kinda purple on the page (see printed pages off websites with blue links... sometimes they look purple (visited)).

Whoever is printing for you may have such a list, with swatches, so that you can see what your colours will really look like on paper. Sometimes the type of paper will look like they change the intesity of the colour too. If you are printing, you need to print the main colours you are using and see how they appear on paper-- then you may see how you can "brighten" them.