Merge pull request #375 from AmrutaJayanti/LeetCode

Create Colors-and-Backgrounds.md

Author: ajay-dhangar

docs/CSS/css-basics/Colors-and-Backgrounds.md

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+# Colors and Background
+
+In CSS, controlling colors and background properties is fundamental for styling web pages. This includes setting text colors, background colors, images, gradients, and more. Below are the main properties and techniques for handling colors and backgrounds in CSS.
+
+**1. Text Color**
+
+The color property sets the color of the text. Colors can be defined using various formats, such as named colors, HEX codes, RGB, RGBA, HSL, and HSLA.
+
+Hex - Codes :
+
+<img src="https://tse4.mm.bing.net/th?id=OIP.9ipFzqjVN-PlJKwrpuAiuQHaFM&pid=Api&P=0&h=180" alt="HexCode" height="200cm" width="200cm"/>
+
+RGB (Red-Green-Blue):
+
+<img src="https://tse4.mm.bing.net/th?id=OIP.zBlyNAyf8fFyqp7_vdv2mgHaCx&pid=Api&P=0&h=180" alt="RGB"/>
+
+HSL (Hue-Saturation-Lightness):
+
+<img src="https://giggster.com/guide/static/fed42130c194b0c240a4ec10408adf97/8282f/hsl-cover-2.png" alt="HSL"/>
+
+```css
+/* Named color */
+p {
+    color: red;
+}
+
+/* HEX code */
+h1 {
+    color: #ff5733;
+}
+
+/* RGB */
+div {
+    color: rgb(255, 87, 51);
+}
+
+/* RGBA (with opacity) */
+span {
+    color: rgba(255, 87, 51, 0.8);
+}
+
+/* HSL */
+a {
+    color: hsl(11, 100%, 60%);
+}
+
+/* HSLA (with opacity) */
+footer {
+    color: hsla(11, 100%, 60%, 0.8);
+}
+```
+
+**2. Background Color**
+
+The `background-color` property sets the background color of an element.
+
+```css
+/* Named color */
+body {
+    background-color: lightblue;
+}
+
+/* HEX code */
+header {
+    background-color: #333333;
+}
+
+/* RGB */
+section {
+    background-color: rgb(240, 240, 240);
+}
+
+/* RGBA (with opacity) */
+nav {
+    background-color: rgba(0, 0, 0, 0.5);
+}
+
+/* HSL */
+article {
+    background-color: hsl(210, 100%, 95%);
+}
+
+/* HSLA (with opacity) */
+aside {
+    background-color: hsla(210, 100%, 95%, 0.8);
+}
+```
+
+**3. Background Image**
+
+The `background-image` property sets an image as the background of an element. You can also control its position, size, repeat behavior, and more.
+
+```css
+/* Background image */
+body {
+    background-image: url('path/to/image.jpg');
+    background-repeat: no-repeat; /* Prevents image from repeating */
+    background-size: cover; /* Scales image to cover the entire element */
+    background-position: center; /* Centers the image */
+}
+
+/* Gradient background */
+div {
+    background-image: linear-gradient(to right, red, yellow);
+}
+```
+
+**4. Background Repeat**
+
+The `background-repeat` property controls if/how a background image repeats.
+
+```css
+div {
+    background-image: url('path/to/image.jpg');
+    background-repeat: no-repeat; /* Do not repeat the image */
+    background-repeat: repeat-x; /* Repeat the image horizontally */
+    background-repeat: repeat-y; /* Repeat the image vertically */
+    background-repeat: round; /* Repeat the image, but rescale to fit */
+    background-repeat: space; /* Repeat the image, but add space between repetitions */
+}
+```
+
+**5. Background Size**
+
+The `background-size` property specifies the size of the background image.
+
+```css
+section {
+    background-image: url('path/to/image.jpg');
+    background-size: auto; /* Default, original size */
+    background-size: cover; /* Scale the image to cover the element */
+    background-size: contain; /* Scale the image to be contained within the element */
+    background-size: 100px 200px; /* Specify exact size */
+    background-size: 50% 50%; /* Specify size as a percentage */
+}
+```
+
+**6. Background Position**
+
+The `background-position` property sets the starting position of the background image.
+
+```css
+header {
+    background-image: url('path/to/image.jpg');
+    background-position: left top; /* Align image to top left */
+    background-position: center; /* Center the image */
+    background-position: 50% 50%; /* Center the image using percentages */
+    background-position: 10px 20px; /* Set position using exact values */
+}
+```