I think Roguey is thinking of your average anime inspired jrpg with the "colorful" bit.
That is not "your average anime" JRPG, that's a drawing from Akira Toriyama, the author of Dragon Ball and Dragon Ball Z, which happens to be the character designer of Dragon Quest since forever.
And that's providing that something like the "average anime" look exist, which it doesn't. Almost every JRPG has its own character designer and art director that provides unique style to the game, usually becoming part of the personality and essence of the saga itself. Some JRPGs have remained with the same character designer for 20 years or more, Dragon Quest being one of those examples.
In comparison there are western devs, which lack identity to the point that most of their games had the same (hideous) looking characters, lack of colour palette, environment feeling and design. The compilation of hideous characters from different western games including western RPGs are famous. Character designers and artist are thrown and changed twenty times and nobody notices because games are made with less identity as possible, and that's providing that they have something like an actual artist in the first place and not just the usual 3D asset monkey manipulator.
This forum is full of people who think the pinnacle of art style is Fallout, Torment, Icewind Dale, Baldur's Gate, and dislike the cartooniness of Divinity: Original Sin (they dialed down in the sequel on account of this feedback), Kingmaker (also dialed down a bit in the sequel), Harebrained's Shadowrun games, World of Warcraft, and yeah, jrpgs.
You're comparing games that are very different between themselves and which don't necessary attract the same people.
I like every artistic aspect of Torment (though I have preferred they used 2D portraits instead of 3D, pero bueno) and its geniality is mostly a fruit that the style is taken or adapted straight up from the original AD&D Planescape Setting Campaign book, which was wonderfully illustrated by Tony DiTerlizzi. Following closely is Icewind Dale with its great colour palette and portrait set. Both of them are very vivid and colourful. These games are more similar to JRPGs in the sense that they're completely marked by handmade art.
They're not similar to Fallout or Baldur's Gate, that have toned-down colours and in the case of Baldur's Gate hideous portraits that are greatly surpassed for the more stylized versions made by the mangaka of Dungeon Meshi.
Other games that are well valued in the Codex that share similar colourful or vivid palettes are The Witcher III and Kingdom Come: Deliverance. Specially the second, which should be noted that has most of it icons, user interface and map hand-drawn.
Is not true that people here don't like colour.