The CME observed by UVCS, LASCO, and EIT on 23 April 1999 was
notable because of the large number of emission lines measured
by UVCS (Akmal et al. 2001, ApJ, in press).  Intensities of three
lines formed at different temperatures can be viewed together
by ``adding'' three complementary colors, as indicated in the
image.  The vertical axis is time, and the horizontal axis is
distance along the UVCS slit.

In addition, H I Lyman alpha and Lyman beta emission constrains
the CME outflow velocity to be high (i.e., strong Doppler dimming),
and N III (991, 989 Angstrom) provides an additional probe of the
coldest CME material.

The large number of spectroscopic diagnostics, combined with LASCO
electron column density constraints, allows a detailed model of CME
heating and nonequilibrium ionization to be constructed.