pdf not opening properly in adobe acrobat - colours dulled

[Amelia5E53]

Hello,

When I save my design as a PNG or a PDF and then open it in adobe acobat, some of the colours appear dulled. Do you know why this is happening / if there is a way round this? 

Thanks!

[John Mensinger]

For anyone to pinpoint the reason for a disparity, you'd have to post more details about your color management setup, the setup of the document and the types of colors used in it, as well as the PDF export settings used.

[Willi Adelberger]

What is your color blending space in InDesign? CMYK or RGB?

What is the color space in the exported PDF?

Why PNG?

Are you aware about the different gamuths of different color spaces?