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40 votes

How are the publishers able to print book covers in neon colors?

Simply they do not print with CMYK, instead they use spot colors. Spot colors are pre mixed inks and require a printer to print with one more ink. Its a bit like going to a paint shop and ask for a ...
joojaa's user avatar
  • 58.1k
28 votes
Accepted

How to make my logo color look the same in Web & Print?

here is the technical answer Saying that the color is #dd0017 is meaningless, unless it is paired with information about what color space you are using! Therefore also conversion from #dd0017 to CMYK ...
joojaa's user avatar
  • 58.1k
25 votes
Accepted

How to convert color images to black & white in GIMP?

There are several ways of doing it in GIMP, and it depends on the end-result you want. From your question, one can't know if your desired result is really a "black and white" (only) image, or a ...
jsbueno's user avatar
  • 5,234
23 votes

When designing a website, how do I know how users see the colors?

Short answer: you don't. Longer answer: it's literally impossible to take into account all screen settings and calibrations, circumstances and visual (dis)abilities of viewers. That is why there are ...
Vincent's user avatar
  • 25.3k
23 votes
Accepted

Why is Photoshop changing my CMYK numbers?

You have "Only Web Colors" selected. Turn that off as its essentially irrelevant on modern computers. It's trying to figure out how to best represent 50% K in a vastly reduced RGB palette known as Web ...
Ryan's user avatar
  • 23k
22 votes

Why is 50% black/white is 128, and not 127?

Because it is neither... So, someone made a choice. Probably the choice was made by an ex-grocery store owner, who they were used to rounding numbers up, so the client did not complain that they got ...
Rafael's user avatar
  • 37.7k
19 votes

How do I ensure a CMYK cyan that works in Red-Blue stereoscopic printing?

Sadly, these very saturated colors can't be reproduced in CMYK. You could try to make the image in CMYK mode, where you make sure that the red is CMYK(0, 100, 100, 0) and the cyan is CMYK(100, 0, 0, ...
Wolff's user avatar
  • 21.2k
18 votes

How are the publishers able to print book covers in neon colors?

There is a lot to unpack here. An illustrator made a beautiful cover for me in neon, but when we converted the cover from RGB to CMYK what was neon became matte. No. He did a beautiful cover for you....
Rafael's user avatar
  • 37.7k
16 votes

How can one transform a neutral lookup table texture for color blindness?

I'm not sure you are fully understanding what the Photoshop simulation is showing you here. It shows you what these colours look like for someone with colour blindness. You can't export this as it's ...
Billy Kerr's user avatar
  • 87.2k
15 votes
Accepted

Why is CMYK needed when printing when RGB+color profile can provide the same?

I see some professional printers asking for documents using CMYK instead of RGB. But I don't understand how it is better than RGB with an appropriate ICC color profile. This is actually a good ...
Rafael's user avatar
  • 37.7k
13 votes
Accepted

How do I convert an RGB black and white photograph to just CMYK black

Open your file into Photoshop, open the channels panel, you will notice that the black and white areas are presented in all RGB channels. Go to Edit > Convent Profile. In the convert to profile ...
hsawires's user avatar
  • 5,357
13 votes

Photoshop automatically corrects my color

... if I try to assign a text the color #00FFFF it automatically sets it to #6FCCDC instead of converting it to CMYK. It is converting it to CMYK... CMYK and RGB have a different gamut, so ...
Cai's user avatar
  • 40.7k
13 votes

I select a color in Photoshop and it's painting another one

Set the tool's blend mode to Normal before painting with it.
Scott's user avatar
  • 210k
13 votes
Accepted

Is there a loss of quality when converting RGB to HEX?

As Billy Kerr wrote, Hex is not a colour space, but a numerical system such as the decimal system, but with base 16. The differences you notice are probably caused by different RGB colour spaces (such ...
John Doe IV's user avatar
12 votes

Why is 50% black/white is 128, and not 127?

On a 0–255 scale, 50% is 127.5; this is rounded to 128 by convention. (Some do it because of the half-to-even rounding strategy; I do it because #808080 looks nicer than #7F7F7F.) Let's consider a ...
wizzwizz4's user avatar
  • 263
11 votes

Is there a loss of quality when converting RGB to HEX?

I will only complement the other answers. RGB to HEX will give you the same exact color. RGBA to HEX, will not because we do not even know what is beneath the color. If you put another color the ...
Rafael's user avatar
  • 37.7k
11 votes

When is it really worth it to convert RGB to CMYK (If printers do it anyway!)

The RGB gamut is larger than the CMYK gamut. It is exceptionally possible to have RGB colors which can not be reproduced via CMYK inks. Auto-conversion will use a "best guess". These guesses ...
Scott's user avatar
  • 210k
10 votes

How do I ensure a CMYK cyan that works in Red-Blue stereoscopic printing?

If you MUST use Cyan and you want something around RGB saturation then you need to work with paper. There are some that reacts very well to certain paints and give them extra boost. They are also ...
SZCZERZO KŁY's user avatar
9 votes

delete half transparent pixels in image

In the Layers panel, Ctrl+click (or, if on mac Cmd+click) the layer thumbnail to turn its transparency into a selection. Use Select > Edit in Quick Mask Mode to enter Quick Mask Mode. Use Image >...
Wolff's user avatar
  • 21.2k
9 votes
Accepted

Text over background colored getting a weird yellow border

It's caused by anti-aliasing, used by Illustrator to display graphics without pixelated edges. However, anti-aliasing causes display artefacts when two colours butt up against each other. The problem ...
Billy Kerr's user avatar
  • 87.2k
8 votes

How to make my logo color look the same in Web & Print?

Matching colours between screen and print is a complex and sometimes impossible task. Due to the nature of light (Screens, RGB) versus ink (CMYK, Pantones, etc) and the fact that pretty much every ...
Westside's user avatar
  • 9,523
8 votes

Photoshop: how to change from RGB to CMYK without any color loss

No, you can't expect RGB colors to translate exactly to CMYK for printing. Monitors make colors with light. Light can be any intensity. Ink is made of solid physical colors from things like rocks, ...
user8356's user avatar
  • 1,074
8 votes

How to change color of this icon?

Click on the Foreground colour square in the toolbar, and enter the colour as shown here, and click OK. In the layers panel hit the Alpha Lock button Do Edit > Fill with FG colour That's it ...
Billy Kerr's user avatar
  • 87.2k
7 votes
Accepted

Convert to four hues while preserving values/brightness in Photoshop

As others have pointed out, the logic of this question is a bit flawed, but very interesting nonetheless. My answer is mostly based on RGB/HSB math and I admit that there are many questionable aspects ...
Wolff's user avatar
  • 21.2k
7 votes
Accepted

How to create a "painting by number" picture in photoshop?

This will be hard work in Photoshop, but fairly straightforward if you have access to Adobe Illustrator... In Illustrator, you can use the Image Trace function to turn an image into paths. This used ...
Westside's user avatar
  • 9,523
7 votes

Converting from CMYK to RGB (to work with it), then back to CMYK

When printed, the RGB color that came from CMYK will be converted back to the same original CMYK color Nop... It will not. There are several reasons. Color profiles, changes in gamut, simulations on ...
Rafael's user avatar
  • 37.7k
7 votes

Is there a loss of quality when converting RGB to HEX?

No. There is no loss converting decimal RGB or RGBa colours to hexadecimal. Forget online converters In RGBa images, colours require 4 decimal or hexadecimal numbers, one for each channel. Each ...
Billy Kerr's user avatar
  • 87.2k
6 votes

Brand Identity Guideline colors not matching

A few points to make: Any values you have are an approximation, there are RGB colors that cannot be represented in CMYK, likewise there are PANTONE colors that cannot be reproduced exactly in RGB or ...
Cai's user avatar
  • 40.7k
6 votes

How can I increase the contrast in a color image converted to grayscale?

If you need colors that will contrast well when converted to grayscale you need to use colors with contrasting luminosity levels. The RGB or CMYK color models aren't very good for doing this so you ...
Cai's user avatar
  • 40.7k
6 votes

Which conversion process produces better results – RGB to CMYK or the other way around?

I always start in RGB in Photoshop, and generally in CMYK for Illustrator. RGB for Photoshop so I have access to all functions and tools. I switch to CMYK when ready for press as the final step.. ...
Scott's user avatar
  • 210k

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