Questions on the color models, schemes, named colors and color functions supported by Mathematica.
26
votes
4answers
1k views
How to change the default ColorData used in Mathematica's Plot?
This question leads on from the recent question What are the standard colors for plots in Mathematica?
There it was determined that the default color palette used by ...
23
votes
1answer
229 views
Is there a way to access the (lexically) current colour inside Graphics?
Note that this is not a duplicate of the question over there. That one asks for a given point, while I'm asking about the lexical structure (which, of course, is not directly related to any point in ...
23
votes
1answer
424 views
The correct way to linearize colorspace before resizing, blurring etc
There was an interesting discussion on MathGroups dealing with the fact that image-processing functions in Mathematica (and many other software, including Adobe Photoshop) work with RGB, Grayscale ...
22
votes
4answers
1k views
Density plot on the surface of sphere
I would like to make density plots of a list of (size 2 or 3) spherical harmonics on the surface of a sphere. I'd like to plot it so that each element of that list is using a different color (red ...
20
votes
6answers
698 views
ColorData[“VisibleSpectrum”] is wrong?
I am trying to visualize the visible spectrum using the built-in ColorData["VisibleSpectrum"] function which "colors based on light wavelength in nanometers". But I ...
17
votes
9answers
697 views
How to convert a hex color string to RGBColor?
For example: "#FF8000".
How could I convert it to RGBColor or Hue?
16
votes
4answers
548 views
Create colour with given lightness value
How can I create a colour of my chosen hue with a given fixed lightness level?
For example, how can I create a reddish colour, col, so that ...
15
votes
4answers
544 views
How can I create a ColorFunction using Blend?
As shown below, I am trying to find a cool way to show some variance weighted deviation from the mean. There are 10 attributes that I compute the distance for.
How can I add a color function such ...
15
votes
2answers
323 views
Exporting a dashed plot with a color gradient to a vector graphics format ruins the dashing
When exporting a dashed plot with a color gradient to a vector graphics format such as EPS or PDF, the dashing is partly ruined. For example, this command:
...
14
votes
2answers
1k views
How to save plots in grayscale
As sophomoric as this question seems, how should I save plots in grayscale in Mathematica?
I generally like eps images for their scalability and I use ghostscript or other third party perl scripts ...
13
votes
6answers
342 views
X-Y scatter plot with coloring dependent on Z value
I have an array of $(x,y,z)$ triples (array dimensions: N x 3), from which I can make a 2D scatterplot of $(x,y)$ values:
...
12
votes
6answers
627 views
How to find major color in a picture?
I want to find the major color (the color which appears most often) in a picture and do some analysis later.
For example, if I have this picture:
What I want to do is find out that gray, red, ...
12
votes
3answers
164 views
Impose the color for one discrete value above a color predefined gradient
If I plot an array with option ColorFunction -> "Rainbow" :
...
12
votes
2answers
186 views
Pattern that matches colors
Suppose I'm writing a function that takes a color as a parameter; for example:
drawShape[color_] := Graphics[{Style[Disk[], color]}];
But if the caller inputs an ...
12
votes
2answers
180 views
Why does DominantColors keep shuffling the order of the results?
This graphic is produced by running DominantColors (new in Mathematica 9) with different values, using the Lena image as the source:
Each row is a list of the ...
12
votes
2answers
526 views
Using a ListDensityPlot to map color onto a ListPlot3D graph
I have a 3 column list of data points. The first two columns correspond to x and y coordinates, with data points creating a surface in the z direction from column 3. This gives me a nice wavy ...
11
votes
6answers
373 views
Overlapping Red and Green ArrayPlots to show yellow intersections
Let's say I have two ArrayPlot[]s. One is in redscale and the other is in greenscale, such that the lowest value is white and the highest value is pure red or ...
11
votes
2answers
214 views
Using uniform coloring in MatrixPlot
I have a rectangular matrix, which is m-by-10. Each element is either 0 or 1. I would like 0 to correspond to white elements, and 1 to red elements. This works ...
11
votes
2answers
212 views
can a ColorFunction have side effects?
Can anyone explain this (to me) odd behavior. If I run this code once (fresh kernel) it works as intended.
...
10
votes
4answers
385 views
Coloring Points in a Plot, based on their position in the list
Before I describe the question, I'd like to say that I've seen the excellent answers posted here but have not managed to get them to work for my own data.
I have a list of values that I would like to ...
10
votes
2answers
130 views
How does one adjust ColorFunction quality independently of surface quality?
I have a function $f:\mathbb{C}\rightarrow\mathbb{C}$ which I would like to visualize by by plotting $|f|$ with Plot3D using $\operatorname{Arg}f$ as the ...
10
votes
2answers
337 views
How to vary color of fill between listplots based on y-distance between them
I have two lists with the same x-values but different y-values. I have used ListPlot to plot and fill the space (line) between them; however, I would like the color ...
9
votes
4answers
562 views
Height-dependent filling color in 3D Data Plots
I would like to have the filling of my ListPlot3D display the same color than the one applied to the data. This question makes sense only in the case of conditional coloring of data (according to ...
9
votes
2answers
211 views
How can I prevent ColorFunction from disabling antialiasing in graphics?
When I use ColorFunction, the appearance of my plots is ruined, changing from this
which has the normal smooth lines and antialiased fonts, to this
in which ...
9
votes
1answer
168 views
Error Using Sow in DensityHistogram with ColorFunction
To find the color values used in a plot, I was using Sow as shown here:
...
8
votes
3answers
202 views
Quickly display a color graphically
When manipulating colors, the output is shown as a textual expression like Hue[1/5], RGBColor[2/3, 1, 1/3], ...
8
votes
2answers
388 views
Use different ColorFunction for each function plotted
When plotting two curves on one plot, you can specify different colors for each function:
Plot[{Sin@x, Cos@x}, {x, 0, 4Ï€},
PlotStyle -> {Red, Blue}]
To ...
8
votes
2answers
403 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
242 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
2answers
425 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 ...
7
votes
4answers
971 views
Coloring Points in a List Plot [duplicate]
Possible Duplicate:
ListPlot with each point a different color and a legend bar
I want to color the points in a list plot using a function of the (x,y) values.
I tried this (example with ...
7
votes
2answers
518 views
problem with coloring spherical harmonics
I want to color a spherical harmonics. So I write as follows.
...
7
votes
2answers
361 views
Coloring each face of a Cuboid with a different color
Is there a way to color each face of a Cuboid with a different color?
I looked in the help but couldn't find anything. I found this Coloring the faces of a 3D ...
6
votes
3answers
355 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
2answers
232 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
3answers
256 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
4answers
339 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
1answer
251 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:
...
6
votes
2answers
510 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
254 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 ...
6
votes
0answers
111 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 ...
5
votes
5answers
606 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 ...
5
votes
3answers
171 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
3answers
262 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
520 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
3answers
261 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
2answers
268 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
2answers
236 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 ...
5
votes
1answer
127 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 ...
4
votes
1answer
161 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 ...
