Questions on the color models, schemes, named colors and color functions supported by Mathematica.

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8
votes
3answers
729 views

256 Shades of Grey

I noticed that the following line, Image[Table[x, {y, 1, 250}, {x, 30/256, 40/256, 0.02/256}], Magnification -> 1] results in the following image: In the ...
8
votes
2answers
846 views

ColorFunction in Histogram[]

Let's say I have a Histogram: Histogram[RandomVariate[NormalDistribution[10, 2], 500]] and I want the bars positioned to ...
8
votes
1answer
476 views

Discrete coloring in Plots

I would like to have a plot that is filled to the axis with Green if the y value is greater than 10, and ...
8
votes
1answer
85 views

Mathematica's “POV” export format ignores ColorFunction

I was playing with xslittlegrass's Pov-Ray package and more generally with the POV-conversion function ExportString[#, "POV"] &, and noticed that ...
8
votes
2answers
837 views

How to calculate mix of 4 colors defined in CIELAB L*a*b* model?

I have 4 colors that I converted from RGB to CIELAB L*a*b* model. How can I calculate mix of these 4 colors when I have (L,a,b) for each such color? How can I ...
8
votes
1answer
359 views

Way to find color at a point in a Graphics?

I need to figure out a way to find out the RGB color value at a certain coordinate in a Graphics object. The Graphics object I am dealing with is continually Dynamically updated, so it is made of ...
8
votes
0answers
187 views

Break[] inside ColorFunction

f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x) Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)] Break::nofwd: No enclosing For, While, or Do found ...
7
votes
3answers
229 views

Different colors for nodes in tree plot

I have some list of numbers which I am plotting using TreePlot. This is the code: ...
7
votes
2answers
162 views

Why does StreamColorFunctionScaling refuse to turn off?

Consider this simple streamline plot: StreamPlot[{-y/10, x/10}, {x, -1, 1}, {y, -1, 1}, StreamColorFunction -> Function[{x, y, u, v}, Hue[v]]] The ...
7
votes
2answers
435 views

How to create an inverse pole figure color map

To interpret electron backscatter diffraction (EBSD) results, inverse pole figures are used. A three dimensional space of directions ([100], [110] and [111] for those who know about crystallography) ...
7
votes
1answer
388 views

Color linear interpolation of ParametricPlot3D

I am looking for any ideas about how to colorize an ellipsoid with a custom gradient style or by a Blend function. I would like to colorize ellipsoid as follows: ...
7
votes
2answers
227 views

Union of plotted regions as sum of colors

I wish to plot 2 functions $f$ and $g$ so that the region bounded by $f$ has color $c_f$, the region bounded by $g$ has color $c_g$, and the region bounded by both has color $c_f+c_g$. E.g. $c_f$ is ...
6
votes
6answers
2k views

How do I fill in a circle made by ParametricPlot with one solid color?

I have a very simple question but I am new with Mathematica. I made a circle on a parametric plot and I made the line black. I want to make the inside of the circle on the parametric plot red. So the ...
6
votes
3answers
620 views

Adapt ColorFunction in Array Plot

The problem I'm facing is how to adapt ColorFunction so that it ranges from green (low values) to red (high values): ...
6
votes
3answers
310 views

Fill circle layers with colors according to read values from a plotted curve

I want to read (temperature) values from plotted (cooling) curves and visualize them in layered circles. I have an example made manually for clarification: 3 plotted curves, at certain time steps ...
6
votes
4answers
1k views

Determining the RGB values of the default plot color

In Mathematica 7, the default plot color is a purple-like color (although I think it is not Purple). Is it possible to use Mathematica to determine the RGB color ...
6
votes
2answers
392 views

Problem achiving effect I want with ColorFunction

I want to create a plot showing historical annual maximum and minimum temperatures. I've figured out how to get 10 years of historical temperature data from Wolfram|Alpha. The plot below shows the ...
6
votes
4answers
607 views

Discrete ColorData scheme with n colors?

I am trying to visualize a problem I am working on. For this, I need $n$ distinct colors which are preferably easy to distinguish. (Obviously, the higher the $n$ is, the harder it is to distinguish ...
6
votes
3answers
556 views

Changing background colour of a Manipulate element

Please consider the following: Manipulate[Plot[Sin[x (1 + a x)], {x, 0, 6}], {a, 0, 2}]; Now, I would like to change the background colour to yellow. I tried ...
6
votes
2answers
414 views

Adjusting Density Plot Color Function for Diffraction Simulation

I'm trying to simulate Fraunhofer diffraction by a single slit using DensityPlot I run the code: ...
6
votes
2answers
383 views

Combining three R, G, B matrices into a single matrix of 3-tuples?

Working with Mathematica 8 on OSX here. I have three $1024 \times 1024$ matrices representing the counts from consecutive exposures onto a CCD with $R$, $G$, and $B$ filters on it, and am looking to ...
6
votes
2answers
168 views

How to use Mathematica to turn a picture into low poly style?

I want to use Mathematica to turn a picture into low poly style. That is, to make the following conversion: Bill to Bill low poly(Using Image Triangulator App). I think the biggest difficulty is how ...
6
votes
2answers
1k views

Gradient/ColorFunction in Disk with transparent background

My goal is to make an iOS-like enable/disable switch like this: I use a LocatorPane for the slider with so-called "jumps" to only make two settings possible: ...
6
votes
1answer
2k views

Fixed color scale in multiple density plots

I think there should be a simple solution for my current problem, but neither StackOverflow (or the help of Mathematica) or Google have it. I have to plot multiple density plots with a color ...
6
votes
2answers
398 views

Monochrome PNG (and GIF) Export

Is there a way to Export expressions to a monochrome PNG? I have tried the ColorQuantize function which is mentioned in ...
6
votes
1answer
181 views

Is it possible to render Graphics with more than “Byte” bitdepth?

I wonder is it possible to render Graphics in Mathematica with bitdepth higher than "Byte" which is the maximum bitdepth ...
6
votes
1answer
288 views

My black text isn't black after exporting to PDF

Consider any standard plot, with true CMYK black text: ...
5
votes
3answers
355 views

How can I set different opacity values for the background of a ListPlot

In the following example: ListPlot[{1, 2, 3}, Background -> Green] how can I set the Opacity[] for the background such ...
5
votes
5answers
152 views

Providing a color function for ListPointPlot3D

Is there a way to write ListPointPlot3D expression, so when given a list of points, the the color of the points plotted is a function of the index/element number of ...
5
votes
3answers
570 views

Parameters for the CIE XYZ Color Space in Mathematica

In Mathematica, producing a color based on its RGB parameters is easy; one can use (for example) ...
5
votes
1answer
1k views

ListContourPlot-ColorFunction

How can I use ONLY the central 90% of the spectrum, not the whole range? For example, I do not like to see the lowest values in purple, but in deep blue color. ...
5
votes
2answers
236 views

Formatting text through pattern matching

I am trying to format some text based on some patterns. ...
5
votes
3answers
617 views

ColorFunction and/or ColorScaling issue with ParametricPlot3D

My goal is to use ColorFunction to color a cylinder based on the $z$ value of a separate Plot3D. I'm not sure if I am making a ...
5
votes
1answer
272 views

Apply color function to matrix plot

I want to apply the following color rules to a large table of numbers. I have extracted a part of the table to use as an example. I would like to assign 5 different colors to 5 different ranges of ...
5
votes
2answers
160 views

How to color separate a colored-in-pencil drawing?

I'd like to pick out just the "pencil" color in some drawings done by a young member of the household (he'd like to print out copies of these pictures and distribute them to his class mates on the ...
5
votes
2answers
777 views

Plot3D with coloring based on phase value of f

I'm reading a sample chapter of Visual Complex Functions by E. Wegert. Near the bottom of this page, there is a link "Download Sample pages 1 (pdf, 2.4 MB)" which allows you to read Chapter 2 of the ...
5
votes
2answers
391 views

Sharp ListDensityPlot

I have some quantity varying with time (horizontal axis of the plot): it first oscillates then it has a jump (larger than the amplitude of the oscillations), then it continues oscillating. I have that ...
5
votes
1answer
96 views

Odd colourization for FourierParameters. UI bug?

The Mathematica UI colourizes the FourierParameters in the following ...
5
votes
1answer
167 views

CMYK colour using Drawing Tools

I'd like to use the Drawing Tools palette to draw objects in CMYK colour. The only way I seem able to change the colours of these objects is to use the window shown below. Edit Is there a way to ...
5
votes
0answers
90 views

Is Mathematica 10 color managed?

With ColorProfileData[] Mathematica 10 can handle device-dependent color spaces. However, images with embedded color profiles, e.g. sRGB, are rendered and displayed ...
4
votes
2answers
345 views

Coloring a shape according to a function

I would like to create a $2D$ shape, say an ellipse, where each point in the ellipse is colored according a RGB function, so at point ...
4
votes
2answers
172 views

Character display color

I'm looking to cause the front end to display individual characters in a specific color, just in general, as a default sort of thing. For instance, the character "1" would always display as a red 1, ...
4
votes
3answers
233 views
4
votes
2answers
298 views

Plotting two functions with dependent input function

I have defined a function: myJ2[n_] := 1/n* Total[RandomVariate[NormalDistribution[0, 1], n]^2] This is basically an approximation to the gaussian integral. I ...
4
votes
2answers
225 views

Filling a plotted line both below and above the line

I'm relatively new to Mathematica. I tried looking for a solution online but couldn't find anything. I want to fill a plotted line both above the line (one color) and below (another color). For ...
4
votes
2answers
174 views

Using two color functions in a MatrixPlot

I'm trying to use two color functions within one MatrixPlot in Mathematica. Is it possible to do this? For example, using a very simple matrix: ...
4
votes
4answers
163 views

Change the colour of a ListPlot element in each iteration of Manipulate

I would like to modify the colour of dots in a ListPlot[Table[function]], e.g ...
4
votes
2answers
661 views

Define a color function based on color samples obtained from ColorBrewer

I am quite new to mathematica and I am searching for a way to create a smooth colormap based on the samples given by http://colorbrewer2.org/ . Is it possible to create a interpolated function from ...
4
votes
2answers
339 views

Colorize Grayscale Image

I have a grayscale image that contains two objects. The grayscale pixel values can be divided into three intervals where two of them represent objects and the third represents the background. The ...
4
votes
1answer
425 views

Calculating pleasant colors for source code or web-design

I really like when the programs or editors I use have pleasant colors. Sometimes when there's nothing else to do or sometimes when there are very important, but incredibly boring things to do, I find ...