created an attachment (id=162000)
screenshot

description:
[accessibility] font preview does not show in chart builder under high contrast mode

build:
2.6.0.v20100315-0630

steps to reproduce:
1. activate the highcontrast function using the keyboard shortcut
(left-alt+left-shift+printscreen).
2. new a chart, go to "format chart" tab.
3. open a font editer, check the content in preview area

actual result:
see the screenshot.

expected result:
the contents are shown completely.
fixed. keep the color definition null if it's set to auto.
verified