dynamiccolors.faq

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The dynamic color control codes are of the form "ESC ] Ps ; name BEL"
Ps determines the color to change, from
    10: Foreground, 11: Background, 12: Cursor,
    13: Mouse cursor foreground, 14: Mouse cursor background
    15: Tek window foreground, 16: Tek window background
and name is the color to change it to, e.g., "white" or "#FFF"
for example, 

    echo "^[]10;red^G" 
        to change the foreground text color to red or

    echo "^[]11;#fff^G" 
        to change the background color to white.

(See the color_xterm.man file)

Unlike the ANSI color codes, these codes change all the text which
is in the default foreground/background color; you can only have one
default foreground color.  The color of text set with the ANSI codes
is not dynamically alterable, but can be set with the 
    *color0, *color1, etc., application resources.
Whether dynamic colors are enabled or not depends on the *dynamicColor
resource and the -dc/+dc command line option.