Not enough light

What's happening

Triostar earns its dramatic cream, green, and pink coloring from good light; the pale variegated areas have little chlorophyll, so in dim conditions the plant favors plainer green growth to capture what light it can. New leaves come in with weaker color, and the whole plant can stretch and lean toward the window.

How to fix it

Move the plant to a brighter spot with plenty of bright, indirect light — never harsh direct sun, which scorches it, but well-lit all the same. If your space is genuinely dim, a full-spectrum grow light makes a real difference and is often the only way to keep the variegation rich. Already-faded leaves usually stay that way, but new growth in better light will return with stronger pink and cream.

This is general guidance based on common symptoms; individual plants vary.