What Is a HEX Color Code? How to Read and Find Any Color's HEX Value

A HEX color code is the most common way to specify an exact color in web design, apps, and most creative tools. You have seen them — values like #FF5733, #000000, or #3a86ff. But what do those characters actually mean, and how do you find the HEX code for a color you already have?

This guide explains HEX codes from scratch and shows you how to get the code for any color in seconds using a free online tool.

What Does a HEX Color Code Mean?

A HEX color code is a six-character value that represents a color using the hexadecimal (base-16) number system. It always starts with a # symbol, followed by exactly six characters, each of which is a digit 0–9 or a letter A–F.

The six characters are split into three pairs:

• First two characters: the Red component (00 to FF)
• Middle two characters: the Green component (00 to FF)
• Last two characters: the Blue component (00 to FF)

So #FF0000 is pure red (max red, no green, no blue). #000000 is pure black (all channels at zero). #FFFFFF is pure white (all channels at maximum).

How to Read a HEX Code

In hexadecimal, each pair of characters represents a number from 0 to 255. The conversion works like this:

• 00 in hex = 0 in decimal (channel at minimum — no contribution)
• FF in hex = 255 in decimal (channel at maximum — full contribution)
• 80 in hex = 128 in decimal (roughly half)

Example: #3a86ff

• 3A = 58 red
• 86 = 134 green
• FF = 255 blue

That produces a medium-bright blue color. You do not need to memorize the math — that is what a color picker is for. But understanding the structure helps you recognize what colors are likely when you read a code.

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Shorthand HEX Codes

When both characters in each pair are identical, HEX codes can be written in shorthand with just three characters. For example:

• #FFFFFF can be written as #FFF
• #000000 can be written as #000
• #FF3300 can be written as #F30

Not all tools accept shorthand. When in doubt, use the full six-character version.

Where Are HEX Codes Used?

HEX codes are the standard color format in:

• CSS and HTML — color: #3a86ff; background: #0d1117
• Design tools — Figma, Canva, Adobe XD, Sketch, Photoshop, Illustrator
• Office apps — PowerPoint and Word support custom HEX input
• Brand guidelines — most style guides list brand colors in HEX format
• Social media tools — Buffer, Hootsuite, Canva all use HEX for brand colors

How to Find the HEX Code for Any Color

The fastest way: open a free online color picker, select the color using the wheel or sliders, and copy the HEX value. No download, no account. The tool also outputs RGB and HSL at the same time, so you have all three formats ready if you need them.

If you are trying to match a color from an image, photo, or screenshot, you would need a color-from-image extractor tool, which analyzes pixel values rather than a color wheel selection.

Frequently Asked Questions

Are HEX codes case sensitive?

No. #FF0000 and #ff0000 are the same color. Most tools accept either uppercase or lowercase, and many convert automatically.

What is the difference between HEX and RGB?

They represent the same color using different notation. HEX is a compact six-character string. RGB spells out the red, green, and blue values as three separate numbers (0–255 each). Most tools accept both.

Can HEX codes include transparency?

Yes. Eight-character HEX codes (like #FF573380) include an alpha channel for transparency — the last two characters control opacity. Standard six-character HEX codes are fully opaque. CSS also supports rgba() for transparency in RGB format.

How do I find the HEX code for a color I see on screen?

Open a free online color picker and use the color wheel to match the color visually, then copy the HEX code. For sampling directly from a specific pixel on screen, you would need a screen color sampler tool or Chrome's built-in DevTools eyedropper.