This colour scheme is described in more detail in:
Please cite this paper if you use ‘cubehelix’ in any publications.
When you are satisfied, press one of the ‘make…’ buttons, which will write the text of the ‘look-up-table’ file into another window/tab. From there you should copy the text to a local file (or save as text).
The formats available are (a) DS9/saoimage, (b) decimal values for the fraction along the look-up-table (i.e. 0.0 to 1.0), and red/green/blue intensities (again 0.0 to 1.0), (c) the fraction along the look-up-table, and red/green/blue intensities in hex (00 to FF), (d) kvis look-up-table (in hex format, to convert to binary for use, copy to a local file and then (for Unix/Linux) use xxd -ps -r file.txt file.kf, where file.txt is the file you saved the output to, and file.kf is the binary file to write). You can reverse the output from the usual black → white to white → black if needed.
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