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

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9
votes
1answer
5k views

How can I map the colors in a greyscale image to a specific color “gradient”?

Caveat: I'm not a graphic designer and may be misusing some terminology. Please bear with me. :-) I'm attempting to add color to some greyscale icons (i.e. all three channels are identical). I ...
6
votes
1answer
321 views

Never use white?

There was a famous blog post by Ian Taylor called "Never use black", in which he explained that one should never use pure, complete, 0-0-0 black, and should instead put a little bit of color or light ...
6
votes
1answer
207 views

Tips for using poor colours well

This is less of a question with a definitive answer and more of a request for some tips. I am hoping that some of you may had had this problem yourself and can offer some advice. I have been ...
5
votes
2answers
357 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
1answer
452 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
4answers
426 views

Color Theory: Is there a measurement of “colorfulness”?

I was adding some colors to a Windows application. A column was going to be colored in order to indicate groupings to the user. So in Photoshop i first selected some colors to use. Being ...
2
votes
3answers
14k views

How to convert document Illustrator file to only one color? (eg. Green)

Is there any way of converting a illustrator file with text and logos to one only. As I'm working for a client that only wants to print with one-color?
1
vote
2answers
329 views

Colour theory and rainbow palettes

I've been reading about colour theory and want to understand how it relates to rainbow palettes like the attached, also a palette type commonly used by the designer Paul Smith as his signature. How ...
9
votes
5answers
8k 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
523 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
128 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
1k 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
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) ...
4
votes
2answers
221 views

Perception and color theory

I'm making a custom keyboard and want it to look nice, and like Apple's, without actually copying pixels. I did a bunch of work on creating keys and the background, only to be amazed once again by ...
3
votes
1answer
250 views

Normalizing hematoxylin and eosin-stained histology images

This is a medically related question...Most pathology slides are stained with hematoxylin (blue) and eosin (red). However, every lab does it differently. I would like to take a bunch of images from ...
3
votes
3answers
2k 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
1k 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 ...
2
votes
2answers
2k views

Is there a way to make Adjustment Layers ignore certain layers?

Is it possible to insert a Hue/Saturation adjustment layer at the top of all layers - but make it so that chosen layers are not affected by it? Can it be done without altering positions? (Ie. moving ...
1
vote
3answers
141 views

What's the name for images like these?

I'm trying to figure out the name for, or a collection of, the kinds of images that "fade-into" a solid color. For example, twitter has this image: This allows them to add a background image that ...
7
votes
2answers
123 views

Calibrating a screen on a budget?

How would you calibrate a screen on a budget? Are there simple, affordable devices, methods, or printed kits that help achieve at least some degree of colour correctness on a modern TFT monitor? ...
6
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
918 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
221 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
240 views

How to tint or alter the colour of a pattern in Inkscape?

I am able to import and apply patterns to objects, but I don't know how to adjust the colour of the patterns. How does one tint a pattern in Inkscape?
3
votes
1answer
390 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
446 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 ...
2
votes
1answer
250 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
8k 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
986 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
284 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
808 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
53 views

Question about spot colours in full colour documents

I am trying to understand various aspects of spot colours. If I am working in photoshop and I use say a pantone colour for a part of my artwork (in my CYMK file) ... lets suppose I've used it as the ...
0
votes
1answer
243 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 ...