Underwater Color Corrector

Free

Restore natural colors in underwater photos and videos with same underwater correction logic used in qrati-web post-processing.

Tool workspace

Drop underwater photos or videos to restore their colors

Why Underwater Photos Look Blue

Water as a Color Filter

Water molecules absorb red light first. Within the first 5 meters, reds are gone. Yellows and oranges follow by 10–15 meters. Below 30 meters, only blue and green remain. Your camera sensor captures this filtered reality — the Red Channel Boost algorithm compensates by restoring what the water removed.

Histogram-Guided Rebalancing

The filter first measures the image average and rotates red toward a healthier baseline so heavily absorbed warm tones can re-enter the mix. It then builds per-channel histograms, finds the broadest low-density normalization interval in each channel, and uses those ranges to derive a color matrix that stretches contrast, restores red response, and applies a small blue compensation.

Blue Travels Farthest

Blue light has the shortest visible wavelength and penetrates water more effectively than red, which is why underwater scenes drift cyan or blue even when the water looks clear to your eyes. That color cast is not just a camera problem. It is physics reshaping the light before it ever reaches the lens.
Pro Tip: Pro tip: the closer you shoot to your subject underwater, the better any color correction will look. Every extra meter adds more water between the lens and the scene, which means more red loss, lower contrast, and more haze for the filter to fight.
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