you can change what shows up in tinymce by going to dashboard > sitewide settings.. bottom right corner..

Hey,
I see where you are talking about. I entered the code:

theme_advanced_text_colors : "FF00FF,FFFF00,000000"

into the custom toolbar area and still no choice of text color in the editor. I guess I'm not sure what the correct code is to add the text color picker. thanks for your quick response.
Here's my custom setup right now.
theme : "concrete",
plugins: "inlinepopups,spellchecker,safari,advlink",
editor_selector : "advancedEditor",
spellchecker_languages : "+English=en",
theme_concrete_buttons1 : "bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,hr,|,styleselect,formatselect,fontsizeselect",
theme_concrete_buttons2 : "bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,forecolor",
theme_concrete_blockformats : "p,address,pre,h1,h2,h3,div,blockquote,cite",
theme_concrete_toolbar_align : "left",
theme_concrete_fonts : "Andale Mono=andale mono,times;Arial=arial,helvetica,sans-serif;Arial Black=arial black,avant garde;Book Antiqua=book antiqua,palatino;Comic Sans MS=comic sans ms,sans-serif;Courier New=courier new,courier;Georgia=georgia,palatino;Helvetica=helvetica;Impact=impact,chicago;Symbol=symbol;Tahoma=tahoma,arial,helvetica,sans-serif;Terminal=terminal,monaco;Times New Roman=times new roman,times;Trebuchet MS=trebuchet ms,geneva;Verdana=verdana,geneva;Webdings=webdings;Wingdings=wingdings,zapf dingbats",
theme_concrete_font_sizes : "1,2,3,4,5,6,7",
theme_concrete_styles: "Note=ccm-note",
spellchecker_languages : "+English=en"

/*
// Use the advanced theme for more than two rows of content
plugins: "inlinepopups,spellchecker,safari,advlink,table,advhr,xhtmlxtras,emotions,insertdatetime,paste,visualchars,nonbreaking,pagebreak,style",
editor_selector : "advancedEditor",
theme : "advanced",
theme_advanced_buttons1 : "cut,copy,paste,pastetext,pasteword,|,undo,redo,|,styleselect,formatselect,fontsizeselect,fontselect",
theme_advanced_buttons2 : "bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,bullist,numlist,|,outdent,indent,blockquote,|,link,unlink,anchor,|,forecolor,backcolor,|,image,charmap,emotions",
theme_advanced_fonts : "Andale Mono=andale mono,times;Arial=arial,helvetica,sans-serif;Arial Black=arial black,avant garde;Book Antiqua=book antiqua,palatino;Comic Sans MS=comic sans ms,sans-serif;Courier New=courier new,courier;Georgia=georgia,palatino;Helvetica=helvetica;Impact=impact,chicago;Symbol=symbol;Tahoma=tahoma,arial,helvetica,sans-serif;Terminal=terminal,monaco;Times New Roman=times new roman,times;Trebuchet MS=trebuchet ms,geneva;Verdana=verdana,geneva;Webdings=webdings;Wingdings=wingdings,zapf dingbats",
theme_advanced_text_colors : "FF00FF,FFFF00,000000"
// etc.
*/

On my site, (5.4.0.3) the color picker seems to be positioned relative to the underlying page rather than to the tinyMCE editor panel.

So, If I edit a page, scroll down to a block at the bottom of the page and edit the content block, I don't see the color picker. I have to scroll the underlying page back to the top and then click the color picker.

The pull-downs for style, format, font, and font size have a similar problem - their vertical position is tied to the scrolling of the underlying page rather than to the editor panel, although they don't disappear altogether when you scroll down like the color picker.

Did you ever find a fix for this?? This JUST happened to me today. Grateful I found your post so at least I can scroll up on the underlying page to get to the color picker (or directly edit the html), but what if a this happens to a client? The only thing I did out of the ordinary was RESTORE DEFAULTS on a couple of block border settings.

Thanks.

I could be wrong, but I thought this was fixed, but it has evidently been broken again in the latest release of Concrete5 (5.4.2).