Using IM4 on editing POD chart colour attributes a color picker box does not appears.
To solve this issue you need to login into IM4 framework on APEX. Go to page 997.
You need to change the first line :
<script type="text/javascript" src="/&FRAMEWORK_DIR./jquery/colorpicker/jquery.colorpicker"></script>
To:
<script type="text/javascript" src="/&FRAMEWORK_DIR./jquery/colorpicker/jquery.colorpicker.js"></script>
And color picker will appear on (IM4/admin/POD maintenance/chart attributes):