You can type an RGB triplet in to the RGB value box seperated by commas
and select the RGB option to view an RGB color and move the colorspace.
The HEX value works the same way, except you use hex numbers, without
and leading hash (#) or 0x or anything like that.
The top-left square of the colorspace is always the current color
show in the box next to the options.
You can also click the hash (#) marks in the boxes to select that color
and see the values.
Browsers that support the TITLE attribute for anchors (IE,Mozilla) will
show the hex code if you hold your mouse over the hash mark.