I Window blinds - colour depends on window open/closed

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The perceived color of window blinds can change based on whether the window is open or closed due to the glass's filtering effect on light. Regular glass, which contains iron, can impart a green tint, affecting how colors appear indoors. Low iron glass, such as Optiwhite, minimizes this green tint and can provide a more accurate color representation. The discussion highlights the importance of glass type in color perception for interior design. Understanding these factors can help in selecting the right materials for optimal aesthetic outcomes.
Thunderfox
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Hello,

I am a bit confused regarding something I have observed on the blinds in front of my windows. The "real" colour is a sort of a light brownish colour (NCS S 4010 Y50R to be precise - see http://ncscolour.com/product/s-4010-y50r/).

However, when the window in front of it is closed, the colour you perceive from the inside of the house is a sort of a slightly dark greenish one. On the attached image you can see the blinds with the window-door open (right) and closed (left).

This is a bit confusing, I have no idea why the colour changes. There door is triple-glass.

Any ideas ??

Best regards

Richard
 

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The glass filters some wavelengths more than others.
 
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I believe regular glass contains iron which gives glass a green tint. Sometimes the edges of glass are obviously green. You can get low iron glass of which Optiwhite (Spelling?) Is one brand available in the UK. It's used for things like frameless showers.
 
Thanks for your replies. Regards
 
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