so i was learning flutter and i was checking the hot reload function of it and there is a problem i encountered the default program gives you an app that counts the number of times the button is clicked and there is a heading on the top written "Flutter Demo Home Page" and the default background color is deepPurple but when i change it to some other colors like black or grey it gives me some random color and when i do red ,green or blue it works perfectly fine . What could be the problem can someone solve this?
I tried Black ,grey and white for now and i don’t know which many colors won’t work please tell me how to solve this problem!
2
Answers
It is because you are not specificly changing the backgroundColor of the
AppBar, you are changing the value of theseedthat generates a color palette for your app, based on the provided color. And theseeddoesn’t like colors like black, white or grey; it needs a "true" color (with R, G and B not being aligned as for black-to-white tints) to define where it will put the accent while generating the palette.The possible reason here is when you are using Material 3 color scheme and utilizing the fromSeed method, it’s essentially akin to informing Flutter that, "Hey, I have this color as my seed," and it will automatically generate a Material 3-based color scheme/palette, which is then utilized according to Material 3 guidelines by all other components in the app.
So, if you provide grey or black, it doesn’t necessarily mean it will pick that color only for what you expect. It implicitly or automatically picks what suits or looks best. You might need to explicitly specify in that case.
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