Questions about colors, different color space, RGB or CMYK color model, transparent color, using or changing colors.

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9
votes
5answers
7k views

What is 5-colour printing?

When my print rep talks about five-colour printing, what does he mean? I know you have cyan, magenta, yellow and black - but what's the fifth?
7
votes
4answers
474 views

reasoning behind black and white color scheme of perfume sites

In preparation for an upcoming project, I've been looking over a lot of different sites for high end perfumes and/or high fashion. Noticed that most of them (at least the perfume ones) have almost ...
7
votes
1answer
119 views

Is there a metric for “apparent” chroma?

I'm not sure this is the right place to ask, but is anyone aware of a metric for apparent chroma? Now I understand that "chroma" and "chrominance" are very overloaded terms, so to clarify, I ...
6
votes
2answers
838 views

Is there a single text color that is acceptable on both dark and light background?

Is there a single text color that, when used on either dark or light background, produces a readable (or at least tolerable) output? If it makes it easier, constraints can be put on the hue, ...
5
votes
2answers
311 views

Why are certain colors more prone to compression artifacts than others?

I most often see this with compressed video, but I've also seen it often enough with JPEG images. Many times blacks, reds, and other generally dark colors seem to be especially prone to compression ...
4
votes
2answers
8k views

Simple Spot Color Separations for Screen Printing

Ok, I'm an Illustrator noob, but I've worked in screen printing. I made a design which is composed of an expanded Live Trace, a couple of rectangles with fills and strokes, and some text within said ...
4
votes
1answer
315 views

Is there an equation to easily convert a color to its matching color in another hue?

I am trying to design a site with a couple color schemes. I am looking for a way to make color schemes that match mathematically. For example, I know that #FF0000 matches perfectly with #00FF00 and ...
3
votes
3answers
1k views

Sampling color of partially transparent objects in Illustrator

Sometimes when using Adobe Illustrator I need to get a range of tints from a certain color, so I'll drop the opacity to, say, 75%, 50%, and 25% on a white background to get there. It's the quickest ...
2
votes
1answer
867 views

logo with color gradient how to do this?

I would like to do the below color gradiant: Does anyone know how to approach this? I have searched but don't know the right way to name this effect. I'd prefer making this effect in Adobe ...
5
votes
3answers
2k views

Completely different interpretation of Pantone to RGB values depending where I look.

I'm making a web site and have been told the corporate color is pantone 2745. In illustrator, here, and here it is a deep indigo color. Here, here, here and here it is a deep violet sort of color. ...
4
votes
2answers
522 views

Why not pure black and pure white?

A New Top Bar for Stack Exchange says, The first thing you’ll notice is that it’s really black*. * Jin points out that technically it’s not quite black: it’s #212121. In its CSS I see, ...
4
votes
2answers
203 views

How to choose a color palette for a website

We're completely color illiterate on our team. Our internal site has a lot of black and white, but I've heard that too much contrast is bad. And people don't respond well to the look of our site. ...
3
votes
1answer
285 views

Illustrator: creating two colour-wheel-like objects out of 23 circles/discs

So what I'm trying to do is make 23 circles in the same style as the image below, but in two concentric rings instead of one big one. The circles should be the same size and also arranged in a ...
3
votes
2answers
382 views

Identifying HTML colour codes placed in one pixel

How many colours at once can one pixel contain? Is there a tool that can represent this pixel in a form of HTML colour codes? (And if there are many colours in this pixel, can this tool show the ...
3
votes
3answers
3k views

Formula for finding out the result of a color after applying x% opacity to it?

I have 2 colors #a1a2a4 black (#000000) white (#ffffff) Now I need to know how much opacity (in a percent) must I apply to the second color (black) against a background of the third color (white) ...
2
votes
1answer
754 views

Is there way to colorize by RGB in GIMP?

There is a colorize tool in GIMP. But it provide only with HSV. Most of time I want to colorize with RGB, so I'm using converter web site like http://www.rapidtables.com/convert/color/rgb-to-hsv.htm. ...
2
votes
1answer
217 views

Rules for adding colors to a black and white palette in web

I am working on a fashion website for my own portfolio, that allows users to have their own account where they save fashion related items. A sort of Pinterest for fashion items. Now, I know that the ...
2
votes
2answers
6k views

Colors change in Photoshop when copying a selection from one document into a new document

I'm trying to copy a particular layer out of a Photoshop document into its own new document and export it for use on the web. I'm doing this by right-clicking the layer in the layers palette, ...
1
vote
1answer
172 views

Illustrator > Recolor Artwork: How to manually choose the replacement colours from swatch groups?

Below is Illustrator's "Recolor Artwork" window. I've chosen to recolour (yes, I'm British) using one of my swatch groups. Notice that the first source colour is replaced with the first swatch group ...
1
vote
1answer
200 views

Black-white and grayscale to alpha conversion for images

Is there an utility for converting all black-white and grayscale images from certain folder to the same images with adjusted alpha channel? For example, for pixel (r:50, g:50, b:50, a:0) I would like ...
1
vote
3answers
723 views

Laptop screen for digital design

I am searching for a laptop with a screen that is suitable for digital design purposes What I am particularly concerned about is a statement made by a poster (on here): (the objective is to) make ...
1
vote
0answers
137 views

Contrast Color with Red [duplicate]

Possible Duplicate: Need help with the Color Combination for the Red Can some one help me to find a color that contrast the color Red HEX: cd0001 I am looking for something i dark rang of ...
0
votes
1answer
219 views

Determine N Contrasting and Aesthetically pleasing colors

How does one algorithmically calculate a set of N colors that are both contrasting and aesthetically pleasing? For example, we want to plot an unknown number of lines on a graph that still looks ...