Forum Moderators: open
WAVE is tool to help web developers make their web content more accessible. WAVE cannot tell you if your web content is accessible. Only a human can determine true accessibility. But, WAVE can help you evaluate the accessibility of your web content.
It says “does not account for background images, gradients”.I'm going to go way out on a limb and hypothesize that maybe, possibly, perhaps they're trying to tell you their tool cannot account for background images or gradients.