ode>fallbackGradient</code> or <code>fallbackImage</code> defined in theme, depending if asset is a foreground/background color, gradient or image, respectively</li>
<li><code>defaultFallbackForegroundColor</code>, <code>defaultFallbackBackgroundColor</code>, <code>fallbackGradient</code> or <code>defaultFallbackImage</code> defined internally, depending if asset is a foreground/background color, gradient or image, respectively</li>
</ul>

<p>However, for overridden system named colors, the fallback mechani