I use the following resource settings:
<property id="COLOR_Background" type="number">0x000000</property>
<setting propertyKey="@Properties.COLOR_Text" title="@Strings.UI_STR_Text_color">
<settingConfig type="list">
<listEntry value="0xFFFFFF">@Strings.UI_COLOR_White</listEntry>
<listEntry value="0xAAAAAA">@Strings.UI_COLOR_Gray</listEntry>
<listEntry value="0x555555">@Strings.UI_COLOR_Dark_Gray</listEntry>
<listEntry value="0x000000">@Strings.UI_COLOR_Black</listEntry>
<listEntry value="0xFF0000">@Strings.UI_COLOR_Red</listEntry>
<listEntry value="0xAA0000">@Strings.UI_COLOR_Dark_Red</listEntry>
<listEntry value="0x00FF00">@Strings.UI_COLOR_Green</listEntry>
<listEntry value="0x00AA00">@Strings.UI_COLOR_Dark_Green</listEntry>
<listEntry value="0x00AAFF">@Strings.UI_COLOR_Blue</listEntry>
<listEntry value="0x0000FF">@Strings.UI_COLOR_Dark_Blue</listEntry>
<listEntry value="0xFF5500">@Strings.UI_COLOR_Orange</listEntry>
<listEntry value="0xFFAA00">@Strings.UI_COLOR_Yellow</listEntry>
<!--COLOR_PURPLE = 0xAA00FF Purple. Not valid on Fenix 3 or D2 Bravo. Use 0x5500AA instead. -->
<listEntry value="0xFF00FF">@Strings.UI_COLOR_Pink</listEntry>
</settingConfig>
</setting>