The following is a transcript of the video. This artist draws lifelike portraits using only one color. Derin Fletcher starts each piece with a color study. She uses this to test the color palette.

Andre Veloux: So I will just reduce the Lego color palette, take out some of the primary colors that I don't want to appear in the portrait. And that way, you get a more realistic and kind of ...

The design is reflective of the aquarium’s aquatic life and the artist’s affinity for large-scale canvases and bright color palettes," read the National Portrait Gallery's press release.