Colours controlled by user.

I have an application where the users want particular data values to be displayed in specific colours. Rather than hard-code this I wish to give control of the colours to the users, store the settings in a table and display the colours dynamically. I've done experimenting and found some restrictions:
As the values will be displayed in a multi-row block I need to set the colours with SET-ITEM-INSTANCE-PROPERTY rather the SET-ITEM-PROPERTY.
In S-I-I-P it is not possible to set background and foreground colour, but must use visual attributes.
I don't need to hard code the colours of the visual attributes as I can give them names containing sequential numbers and loop through them using SET-VA-PROPERTY to set their foreground and background colours.
The problem I have is that visual attributes cannot be CREATED dynamically so a finite number of them need to be pre-created, and there is no way of knowing how many combinations will actually be required.
Do these assumptions appear to be correct ? I am hoping there is a method I have missed which somebody knows about.

I've read the bug and it does not seem to correspond what I am seeing.
I have done an experimental form (10g r2) which succesfully
displays 216 colours. I found, however, that I can only use the
colours found in the standard colour pallette, ie using the following
RGB values: 0, 64, 128, 192, 224, 255
Any attempt to use any other value uses the next lower one in the list.The 48-color bug comes into play if you try to use colors that are NOT in the color palette. As you noted, in your 216 colour test, you had to stick with the predetermined values. If you start a fresh session, you CAN invent 48 independent colours before that substitution starts occurring.
Another little exercise I have been toying with is a formula to set text to
black or white depending on which is most readable for the background RGB values.
I haven't got it quite right yet.Maybe try using white if the sum of all three rgb color units is less than about 450. In one form, I have an algorithm to find a lighter but related color to the one used as the background. Also find a darker but related color. I'll post the code if it would help.
And I too apologize for the spelling of color. Maybe I should create a copy of that fmb, and name it COLOUR.fmb for all you UK people. :-)

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    No symbol table info available.
    #3 0xb788ee23 in g_cclosure_marshal_VOID(int0_t) ()
    from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #4 0xb7872eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #5 0xb78851a0 in ?? () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #6 0xb788e18c in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #7 0xb788e313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #8 0xb7c449e2 in gtk_dialog_response () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #9 0xb7c44db6 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    ---Type <return> to continue, or q <return> to quit---
    #10 0xb788eb2c in g_cclosure_marshal_VOID__VOID ()
    from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #11 0xb7872eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #12 0xb78851a0 in ?? () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #13 0xb788e18c in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #14 0xb788e313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #15 0xb7bfe14a in gtk_button_clicked () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #16 0xb7bff4b8 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #17 0xb788eb2c in g_cclosure_marshal_VOID__VOID ()
    from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #18 0xb787177d in ?? () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #19 0xb7872eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #20 0xb7884915 in ?? () from /usr/lib/libgobject-2.0.so.0
    ---Type <return> to continue, or q <return> to quit---
    No symbol table info available.
    #21 0xb788e18c in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #22 0xb788e313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #23 0xb7bfe06a in gtk_button_released () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #24 0xb7bfe0b4 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #25 0xb7ccda62 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #26 0xb787177d in ?? () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #27 0xb7872eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #28 0xb7884fbf in ?? () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #29 0xb788df69 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #30 0xb788e313 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
    No symbol table info available.
    #31 0xb7e106f3 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    ---Type <return> to continue, or q <return> to quit---
    #32 0xb7ccd252 in gtk_propagate_event () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #33 0xb7ccd628 in gtk_main_do_event () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #34 0xb7b235fc in ?? () from /usr/lib/libgdk-3.so.0
    No symbol table info available.
    #35 0xb7b4a898 in ?? () from /usr/lib/libgdk-3.so.0
    No symbol table info available.
    #36 0xb77b4eff in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
    No symbol table info available.
    #37 0xb77b5660 in ?? () from /usr/lib/libglib-2.0.so.0
    No symbol table info available.
    #38 0xb77b5d9b in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
    No symbol table info available.
    #39 0xb7ccc945 in gtk_main () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #40 0xb7be8b44 in ?? () from /usr/lib/libgtk-3.so.0
    No symbol table info available.
    #41 0xb79432bc in g_application_run () from /usr/lib/libgio-2.0.so.0
    No symbol table info available.
    #42 0x0804c62f in main ()
    No symbol table info available.
    (gdb) quit
    A debugging session is active.
    Inferior 1 [process 4923] will be killed.
    Quit anyway? (y or n) y

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