Make perfect merch.Convert RGB to Japan CMYK in Photoshop

1 What is RGB and Japan CMYK 

RGB refers to the primary colors of light, Red, Green and Blue, that are used in monitors, television screens, digital cameras and scanners. Japan CMYK refers to the primary colors of pigment: Cyan, Magenta, Yellow, and Black. These are the inks used on the press in "4-color process printing", commonly referred to as "full color printing" or "four color printing".

What is the difference between the RGB and CMYK color space and why does it matter?

Simply put, Japan CMYK is the color mode intended for printing with ink, such as business card designs. RGB is the color mode intended for screen displays.

The more color added in Japan CMYK mode, the darker the result. The more color added to RGB, the lighter the result.

Japan CMYK has a numerical range of 4x100; RGB has a numerical range of 3x256. Therefore, the energetic colors that RGB can produce are difficult to reproduce in Japan CMYK.

When designing, the biggest mistake you could make is forgetting to convert to the appropriate color mode for your project. If you forget to do this, colors could appear washed out or too vibrant.

Not sure how to convert? Take a look at some of these resources to make sure you’re doing it right.

2 How to convert RGB to Japan CMYK?


Convert to profile in PS.

Step1: Edit-Convert to profile:

Step 2:  Choose one from the red two. 

you can try the two models and choose a model which will make your design similar to the original one.

Watch the video to learn more about the way:



Convert in PS/ AI and make some adjustments after converting.

 Watch the video

Step1: Convert to Japan CMYK model in PS/AI 

PS: Image-Mode-CMYK color

AI: File-Document Color Mode-CMYK color

Step 2:  Slide the color block to the upper right corner to make it the brightest, and then click the triangle warning sign to make the color closest to the original color

You can change every color to the similar one.

If you still have questions, you can watch the video.



This is a free online color code converter, transform a color hue to another color model, supports three color models, Japan CMYK, RGB and HEX, they can be converted to each other.

Website help:


Best way to deal with it

There will some trouble converting and making the adjustments on it. So the best way to deal the issue is to design under Japan CMYK model!