تغییر رنگ بک گراند

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Interactive Color Changer</title>
    <style>
      body {
        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100vh;
        margin: 0;
        transition: background-color 0.5s ease;
        background-color: #f0f0f0;
      }
      .container {
        background-color: rgba(255, 255, 255, 0.8);
        padding: 30px;
        border-radius: 15px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        text-align: center;
      }
      h1 {
        color: #333;
        margin-bottom: 20px;
        font-size: 2.5em;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
      }
      select {
        padding: 12px;
        font-size: 18px;
        border: 2px solid #ccc;
        border-radius: 8px;
        outline: none;
        cursor: pointer;
        margin-bottom: 20px;
        width: 200px;
        transition: all 0.3s ease;
      }
      select:hover {
        border-color: #888;
      }
      select:focus {
        border-color: #555;
        box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
      }
      .color-preview {
        width: 100px;
        height: 100px;
        border-radius: 50%;
        margin: 20px auto;
        border: 3px solid #fff;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
      }
      .color-name {
        font-size: 1.2em;
        font-weight: bold;
        margin-top: 10px;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <h1>Interactive Color Changer</h1>
      <select id="colorChange">
        <option value="">Choose a color</option>
        <option value="red">Red</option>
        <option value="blue">Blue</option>
        <option value="green">Green</option>
        <option value="purple">Purple</option>
        <option value="orange">Orange</option>
        <option value="pink">Pink</option>
      </select>
      <div class="color-preview"></div>
      <div class="color-name"></div>
    </div>
    <script>
      const color = document.getElementById("colorChange");
      const header = document.querySelector("h1");
      const container = document.querySelector(".container");
      const colorPreview = document.querySelector(".color-preview");
      const colorName = document.querySelector(".color-name");

      color.addEventListener("change", () => {
        const selectColor = color.value;
        if (selectColor) {
          document.body.style.backgroundColor = selectColor;
          colorPreview.style.backgroundColor = selectColor;
          colorName.textContent =
            selectColor.charAt(0).toUpperCase() + selectColor.slice(1);

          const isDark = ["blue", "purple"].includes(selectColor);
          header.style.color = isDark ? "white" : "black";
          container.style.backgroundColor = isDark
            ? "rgba(255, 255, 255, 0.9)"
            : "rgba(255, 255, 255, 0.8)";
          colorName.style.color = isDark ? "white" : "black";
        } else {
          document.body.style.backgroundColor = "#f0f0f0";
          colorPreview.style.backgroundColor = "transparent";
          colorName.textContent = "";
          header.style.color = "#333";
          container.style.backgroundColor = "rgba(255, 255, 255, 0.8)";
        }
      });
    </script>
  </body>
</html>

User 112 1 JavaScript HTML & CSS

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Color Changer</title>
  <style>

    section{
      display: flex;
      flex-direction: column-reverse;
      width: 380px;
      margin: auto;
      background: #a09c85;
      border-radius: 40px;
      border-bottom-left-radius: 5px;
      border: 3px dashed #5c5c5c;
      box-shadow: inset 2px 2px 0px #e5d267,inset -2px -2px 0px #e5d267; 
    }

    h1{
      width: 260px;
      color: #5c5c5c;
      margin: 5px 5px;
      background-color: beige;
      border-radius: 20px 20px 20px 5px;
    }

    #cards {
      display: flex;
      width: 350px;
      height: 120px;
      margin: 10px auto;
      border-radius: 15px;
      overflow: hidden;
    }

    .child {
      flex-basis: 20%;
      transition: flex-basis .1s;
    }

    .child:hover{
      flex-basis: 30%;
    }

  </style>
</head>
<body>
  <section>
    <h1>Change your background</h1>
    <div id="cards">
      <div class="child" onclick="changeColor('#344e41')" style="background:#344e41 ;"></div>
      <div class="child" onclick="changeColor('#c1121f')" style="background:#c1121f ;"></div>
      <div class="child" onclick="changeColor('#1d3557')" style="background:#1d3557 ;"></div>
      <div class="child" onclick="changeColor('#f2f4f3')" style="background:#f2f4f3 ;"></div>
      <div class="child" onclick="changeColor('#0a0908')" style="background:#0a0908 ;"></div>
    </div>
  </section>
  <script>
    function changeColor(color) {
      document.body.style.backgroundColor = color;
    }
  </script>
</body>
</html>

Unun..ali..nunu U JavaScript HTML & CSS

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
            box-sizing: border-box;
            border: 0;
            outline: 0;
        }

        .wrapper-btn {
            width: 60%;
            margin: 20px auto;
            display: flex;
            align-items: center;
            justify-content: space-evenly;
            height: 200px;
            background-color: #efefef;
        }

        .wrapper-btn button {
            padding: 1rem 2rem;
            font-weight: 700;
            font-size: 20px;
            border-radius: 5px;
            color: #fff;
        }

        #blue {
            background-color: #2b2bf3;
        }

        #red {
            background-color: #f74c4c;
        }

        #green {
            background-color: #3af046;
        }

        #white {
            color: #000;
            background-color: #fff;
        }

        #black {
            background-color: #000;
        }
    </style>
</head>

<body>
    <div class="wrapper-btn">
        <button id="blue" data-color="#2b2bf3">blue</button>
        <button id="red" data-color="#f74c4c">red</button>
        <button id="green" data-color="#3af046">green</button>
        <button id="white" data-color="#fff">white</button>
        <button id="black" data-color="#000">black</button>
    </div>
    <script>
        const wrapperBtn=document.querySelector('.wrapper-btn')
        wrapperBtn.addEventListener('click',e=>{
            if(e.target.tagName==='BUTTON'){
                const color=e.target.dataset.color
                document.body.style.background=color
            }
        })
    </script>
</body>

</html>

Mohadese.m M HTML & CSS

package Tax.App;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class Star extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        Pane root = new Pane();

        Button buttonB = createButton("Blue", "#0034ff", 20,root);
        Button buttonG = createButton("Green", "#0ee847", 150,root);
        Button buttonP = createButton("Pink", "#e80ee4", 250,root);
        root.getChildren().addAll(buttonB, buttonG, buttonP);

        Scene scene = new Scene(root, 500, 500);
        stage.setScene(scene);
        stage.setTitle("Star");
        stage.show();

        root.requestFocus();
        scene.setOnMouseClicked(mouseEvent -> root.requestFocus());
    }

    private Button createButton(String text, String color, double layoutY,Pane pane) {
        Button button = new Button(text);
        button.setStyle("-fx-background-color: " + color);
        button.setPrefHeight(50);
        button.setPrefWidth(100);
        button.setLayoutX(200);
        button.setLayoutY(layoutY);
        button.setOnAction(event -> pane.setStyle("-fx-background-color: " + color));

        return button;
    }
}

Tahabx3 T Java