bad color

[aminmir]

hi
i use corona 3 and color of glass have problem .

[TomG]

Some more info would likely be useful - a screengrab of the glass material (e.g. are you using dispersion? absorption? all that would be answered with a screen grab). Also, any post processing applied (bloom glare, luts, highlight compression?), and what is on the other side of the glass in terms of backplate, light source?

[aminmir]

thanks
It just a dark blue color in environment and a corona light behind the glass .

[maru]

Does it also appear if you reset all VFB post processing settings to defaults? (disable curves, LUT, bloom and glare, and all other options) It looks like a result of post processing.
You can also try increasing absorption distance for your glass, or using refraction color instead of absorption.