Chromaticity, an Uncommon card

The card carries these facts from its Wikipedia article.

• Chromaticity consists of two independent parameters, often specified as hue and colorfulness, where the latter is alternatively called saturation, chroma, intensity, or excitation purity.
• This number of parameters follows from trichromacy of vision of most humans, which is assumed by most models in color science.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Chromaticity article was read about 24,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 49 and blocks with 24: each hit it takes is cut by 10 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Chromaticity in the power ranking, all domains together.