For web designers, tools that give instant color codes from anywhere on their display are invaluable. How much, then, would a tool that can do that in the real world be worth? Hopefully you said $649, because that's what Pantone is charging for its new CAPSURE. It's the latest in a long line of tools and utilities designed to help graphics-minded people get accurate color information, a sort of handheld scanner -- just place it on anything and it'll ID your hue in a variety of formats including CMYK, sRGB, and good 'ol HTML. Think of it a