Named for a pet bird
The color takes its name from the domestic canary. That bird is named after Spain's Canary Islands, home of its wild ancestor. Wild canaries are a yellowish green. Breeders made the bright yellow pet bird, and it gave its name to a shade.
Maerz and Paul's A Dictionary of Color of 1930 dates canary yellow as a color name in English to 1789. Today that name often means the yellow ink used in printing, shown here as canary yellow.
Which canary is this?
The code #FDFF63 matches "canary" in the color survey run by the web comic xkcd in 2010, where thousands of people named colors on screen. Wikipedia lists a different Canary, #FFFF99, which is a Crayola crayon sold since 1998. That one is paler. Both are listed on the Wikipedia list of colors A to F. A close match on this site is laser lemon.

