Center this text
``` If this is supported by your Markdown application, the output looks like this: Center this text ## Color Markdown doesn't allow you to change the color of text, but if your Markdown processor supports [HTML](/basic-syntax/#html), you can use the `` HTML tag. The `color` attribute allows you to specify the font color using a color's name or the hexadecimal `#RRGGBB` code. ```html This text is red! ``` The rendered output looks like this: This text is red! The `` HTML tag is technically supported but officially [deprecated](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/font), which means it works for now but you're not supposed to be using it. Unfortunately, there's not another pure HTML alternative. You could try using one of the CSS alternatives. Not all Markdown applications provide CSS support, but if the one you're using does, here's an alternative to the `` tag: ```htmlMake this text blue.
``` If this is supported by your Markdown application, the output looks like this: Make this text blue. ## Comments Some people need the ability to write sentences in their Markdown files that *will not* appear in the rendered output. These comments are essentially hidden text. The text is viewable by the author of the document, but it's not printed on the webpage or PDF. Markdown doesn't natively support comments, but several enterprising individuals have devised a solution. To add a comment, place text inside brackets followed by a colon, a space, and a pound sign (e.g., `[comment]: #`). You should put blank lines before and after a comment. ```text Here's a paragraph that will be visible. [This is a comment that will be hidden.]: # And here's another paragraph that's visible. ``` The rendered output looks like this: Here's a paragraph that will be visible. [This is a comment that will be hidden.]: # And here's another paragraph that's visible. **Tip:** This tip comes from [Stack Overflow](https://stackoverflow.com/questions/4823468/comments-in-markdown). It's been peer-reviewed and used by thousands of people! ## Admonitions Admonitions are frequently used in documentation to call attention to warnings, notes, and tips. Markdown doesn't provide special syntax for admonitions, and most Markdown applications don't provide support for admonitions (one exception is [MkDocs](/tools/mkdocs/)). However, if you need to add admonitions, you might be able to use [blockquotes](/basic-syntax/#blockquotes-1) with [emoji](/extended-syntax/#emoji) and [emphasis](/basic-syntax/#emphasis) to create something that looks similar to the admonitions you see on other websites. ```text > :warning: **Warning:** Do not push the big red button. > :memo: **Note:** Sunrises are beautiful. > :bulb: **Tip:** Remember to appreciate the little things in life. ``` The rendered output looks like this: > ⚠️ **Warning:** Do not push the big red button. > 📝 **Note:** Sunrises are beautiful. > 💡 **Tip:** Remember to appreciate the little things in life. ## Image Size The Markdown syntax for [images](/basic-syntax/#images-1) doesn't allow you to specify the width and height of images. If you need to resize an image and your Markdown processor supports [HTML](/basic-syntax/#html), you can use the `img` HTML tag with the `width` and `height` attributes to set the dimensions of an image in pixels. ```html
```
The rendered output will contain the image resized to the dimensions you specified.
## Image Captions
Markdown doesn't natively support image captions, but there are two possible workarounds. If your Markdown application supports [HTML](/basic-syntax/#html), you can use the `figure` and `figcaption` HTML tags to add a caption for your image.
```html
```) or three tildes (`~~~`) on the lines before and after the code block. The best part? You don't have to indent any lines!
~~~~~~~~~
```
{
"firstName": "John",
"lastName": "Smith",
"age": 25
}
```
~~~~~~~~~
The rendered output looks like this:
```text
{
"firstName": "John",
"lastName": "Smith",
"age": 25
}
```