setBackground(new color()); in java does not understand the given RGB value

java swing hex rgb setbackground

90,562

Solution 1

I have a program with some gui, on the JFrame I set,

 setBackground( new Color(107, 106, 104) );

[The problem] It gives a greyish color, but not the right one! 
If I check the gui's color in Photo Shop, it gives me the RGB 
values (126, 125, 123)

you can not set setBackground for JFrame, this is only possible for ContentPane, for example

JFrame#getContentPane.setBackground(new Color(107, 106, 104));

EDIT

enter image description here

from code

import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Check extends JFrame {

    private static final long serialVersionUID = 1L;

    public void makeUI() {
        JFrame f = new JFrame();
        f.getContentPane().setBackground(new Color(107, 106, 104));
        f.setDefaultCloseOperation(EXIT_ON_CLOSE);
        f.setSize(new Dimension(300, 200));
        f.setVisible(true);
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Check().makeUI();
            }
        });
    }
}

Solution 2

check with Adam's comment and even if not worked then without any working code I am just guessing that this scenario is getting raised due zero ordering or saying layout of the JFrame. Actually in java swing , setting the background color needs a little bit of more attention, check Swing Java Docs.

90,562

Author by

JW_

Updated on July 22, 2022

Comments

JW_ almost 2 years
I have a program with some gui, on the JFrame I set,
```
 setBackground( new Color(107, 106, 104) );
```
The issue is that I get a greyish color, but not the right one. If I check it in PhotoShop, it gives me the RGB values (126, 125, 123)

Ps. I have tried with HEX value, the same result.
JW_ over 12 years

It is in the constructor of a class that extends JFrame?
JW_ over 12 years

mKorbel, I have tested your code, it works like a charm. But the way i'am doing it, it won't work and I can't see why.
mKorbel over 12 years

@JW_ this is reason why we asking for SSCCE, nobody knows what ... :-)
trashgod over 12 years

@mKorbel's result verified using Zoom. I suspect an errant composite mode.
JW_ over 12 years

It's the right answer that getContentPane() needs to be called on the setBackground()
Spoody over 6 years

Don't post code only, add an explanation so that readers can better understand your answer
clearlight about 5 years

Please con't post code-only answers. You need to explain what your code does/how it fixes the problem. Even if you think it's good enough for this one question, the site requires keeping a certain minimal standard of commentary, and there are reasons for it.