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

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13
votes
4answers
550 views

Impose the color for one discrete value above a color predefined gradient

If I plot an array with option ColorFunction -> "Rainbow": ...
13
votes
4answers
558 views

Quirk in VertexColors interpolation when displaying Polygon

When using VertexColors, the docs state: The interior of the polygon is colored by interpolating between the colors specified by ...
13
votes
1answer
392 views

What is the default ColorFunction for Image3D?

What is the default ColorFunction for Image3D? I find it a bit confusing that the most intense colour is not shown where the ...
13
votes
1answer
392 views

How to do color-fill in images in Mathematica?

Color fill, the ability to apply a desired color to an enclosed area, is one of the basic functions provided by most graphic applications. Is there a similar ...
12
votes
5answers
897 views

Randomly assigning color to Graphics3D objects?

I have a set of Graphics3D primitives (here, spheres) which I would like to assign either: One of a subset of colors, e.g. {Green, Red} A random color over some RGB interval Writing something like:...
12
votes
2answers
430 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 ...
12
votes
3answers
308 views

Is there any faster implementation of DominantColors?

The function DominantColors is a simple function but runs incredibly slow when the number n of dominant colors to find is large - it is currently the biggest bottleneck in my code: ...
12
votes
2answers
443 views

Color Histogram3D by Bin Location

I am using a Histogram3D plot to view the correlation of the R & G of an RGB image. Naturally, I want the bins to have a color corresponding to their $x$, $y$ (...
12
votes
2answers
286 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
2k 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 ...
12
votes
1answer
677 views

How to find a specific color in one picture?

In a picture, there are many different colors. How can I just want to find the position of one color. In the following picture, if I would like to find the coordinates of the position of blue, how can ...
12
votes
1answer
711 views

PieChart with radial coloring/color function

I am trying to visually compare multiple functions that depend on a single argument running from $0$ to $1$. They describe a radial property and so I thought it would be nice to use a kind of ...
12
votes
3answers
283 views

Inverse of Interpreter[“Color”]: Convert a RGBColor to a natural language color name

What is the best way to create the inverse function of Interpreter["Color"]? That function takes a natural language color name like ...
11
votes
6answers
634 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 green....
11
votes
4answers
1k 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 ...
11
votes
4answers
2k 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 ...
11
votes
3answers
539 views

How to speed up Colorize

I have a list of about 500 images similar to the following: A = Import["http://i.stack.imgur.com/1bV4O.png"] ...
11
votes
2answers
2k 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 ...
11
votes
2answers
584 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 ...
11
votes
2answers
1k 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 ...
11
votes
2answers
277 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. ...
11
votes
0answers
134 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 ...
10
votes
6answers
1k views

can the color in MeshStyle be specified by a ColorFunction, such as “SunsetColors” for example. If so, what is the correct syntax?

This is an example given in Help: Plot3D[Sin[x y], {x, 0, 3}, {y, 0, 3}, MeshStyle -> Gray] Could this be changed to something like ...
10
votes
4answers
1k 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
3k views

problem with coloring spherical harmonics

I want to color a spherical harmonics. So I write as follows. ...
10
votes
3answers
1k views

Which ColorFunction should I use to get such a gradient of blue-cyan-green-yellow-orange-red?

I want to get the effect in the above Figure. Here is my code: ...
10
votes
3answers
439 views

Match colors to plot themes

How do I get the colors to match the plot theme when I use a PlotLegend that is separate to the plots? I have had a look at How to access new colour schemes in ...
10
votes
4answers
6k views

How to convert rgb to YCbCr?

I looked at ColorConvert, but haven't found a relevant option. Is there a built-in function do this?
10
votes
2answers
6k 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, 4π}, PlotStyle -> {Red, Blue}] To ...
10
votes
2answers
408 views

How do you convert RGBColor to an HTML-style string?

If I run some color processing function, like: Blend[RGBColor /@ {"#DC4E00", "#000000", "#822250", "#FCC11B"}] I get back a ...
10
votes
2answers
1k views

ColorFunction in Histogram[]

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

Error Using Sow in DensityHistogram with ColorFunction

To find the color values used in a plot, I was using Sow as shown here: ...
10
votes
2answers
2k 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 ...
10
votes
0answers
224 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 ...
9
votes
3answers
463 views

Changing the atom color for plotting xyz-files

Mathematica takes the standard color code for atoms when plotting an *.xyz file, but I want to customize the color for the specific atoms. I really become desperate as I did not get it so far. ...
9
votes
4answers
673 views

Color change of area under a curve

I am trying to set a graph to show the value of the equity of an investment based on whether the portfolio is invested or in cash. I tried using the ColorFunction, ...
9
votes
3answers
1k 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 ...
9
votes
3answers
2k 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) ...
9
votes
2answers
264 views

How to define variable “Rainbow” curve colors?

Firstly, I'm not asking about blending a color gradient on a curve. I would like to make the curve color uniform on all its lenght instead, but the color should change dynamically while we slide a ...
9
votes
1answer
710 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 ...
9
votes
2answers
168 views

Why does ColorConvert give a different answer than other websites when converting from RGB to XYZ?

I was recently making a function that needed to convert between several different colorspaces, and I decided to do it manually. @J.M. used many builtin functions to accomplish the same goal. When I ...
9
votes
1answer
122 views

ArrayPlot with a user-defined color function is misbehaving

Bug introduced in 10.0 and persisting through 10.4.1 or later I am using ArrayPlot to show some arrays with values from 0 to 1. I want 0 to be black and 1 to be ...
9
votes
1answer
211 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
4answers
4k 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 ...
8
votes
6answers
299 views

Coloring an image with two Color schemes based on a Range

I would like to color an image generated from some data, using two color schemes based on two ranges of the data. This is my attempt: ...
8
votes
3answers
231 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
562 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 ...
8
votes
1answer
227 views

Highlight selected points in a plot

I need to change color to selected points dynamically in my plot. ...
8
votes
1answer
5k 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 function....
8
votes
1answer
450 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 ...