HEX vs RGB vs HSL: What's the Difference and When to Use Each
How the three most common color formats actually differ under the hood, and practical guidance on which one to reach for in different situations.
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30 guides
Guides
Plain-English guides on color formats, palette building, and accessibility contrast — written to actually be used, not skimmed.
How to Convert HEX to RGB (And Why You'd Need To)
The exact math behind hex-to-RGB conversion, worked examples, and the practical situations where you'd actually need to do this.
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Understanding HSL: Why Designers Prefer It Over RGB
What hue, saturation, and lightness each actually control, and why HSL tends to be more intuitive to work with than RGB for design adjustments.
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What Is Alpha/Opacity and How RGBA Works
What the alpha channel actually controls, how RGBA and HSLA extend standard color formats, and common misunderstandings about transparency.
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Common Color Values Every Designer Should Recognize
A practical reference of frequently used hex and RGB values worth recognizing on sight, and why memorizing a handful speeds up everyday work.
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Why the Same Color Looks Different on Different Screens
The real technical reasons an identical color value can appear differently across devices, and what can and can't be done about it.
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CMYK vs RGB: Why Print and Screen Colors Never Match Exactly
The fundamental difference between how screens and printers produce color, and why a perfect match between the two isn't actually possible.
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Named Colors vs Hex Codes: What 'CSS Color Names' Actually Are
What CSS named colors actually are under the hood, how many exist, and when using them makes sense versus using a hex code directly.
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How Many Colors Can a Hex Code Actually Represent?
The math behind how many distinct colors standard 6-digit hex codes can represent, and what that number actually means in practice.
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A Beginner's Guide to Reading a Hex Color Code
A step-by-step, no-jargon explanation of how to read and roughly interpret a hex color code just by looking at it.
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Complementary, Analogous, and Triadic: The Basic Color Harmony Rules
The three foundational color harmony schemes explained in plain language, with examples of when each one tends to work best.
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How to Build a Color Palette from a Single Photo
A practical approach to extracting a usable color palette from an existing photograph, and why this method often beats picking colors from scratch.
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Why Some Color Combinations Just 'Work' (The Theory Behind It)
The underlying reasons certain color pairings feel pleasing while others feel jarring, beyond just following memorized harmony rules.
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Monochromatic Color Schemes: How to Use One Hue Well
How monochromatic palettes work, why they're often underrated, and practical tips for avoiding the flat, boring look they can risk.
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How Many Colors Should a Website or Brand Actually Use?
Practical guidance on how many colors a coherent brand or website palette typically needs, and why more isn't automatically better.
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Warm vs Cool Colors: What They Actually Mean and Why It Matters
What separates warm colors from cool colors on the color wheel, the psychological associations behind the distinction, and practical uses.
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How to Choose an Accent Color That Doesn't Clash
A practical approach to picking a single accent color that stands out appropriately without fighting the rest of an existing palette.
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Common Color Palette Mistakes Beginners Make
The most frequent color palette mistakes people new to design run into, and straightforward ways to avoid or fix each one.
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What Is the 60-30-10 Color Rule (And Should You Follow It)?
How the classic 60-30-10 color proportion rule works, where it comes from, and when it's genuinely useful versus overly rigid.
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Building a Palette for Accessibility From the Start
Why designing an accessible color palette from the beginning is easier than retrofitting one later, and a practical approach to doing it.
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What Is WCAG Contrast Ratio and Why It Matters
What the WCAG contrast ratio actually measures, how it's calculated, and why it matters for far more people than is often assumed.
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AA vs AAA: Understanding the Two WCAG Accessibility Levels
The practical difference between WCAG's AA and AAA contrast standards, and guidance on which level to actually target for a given project.
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Why White Text on a Light Background Fails Accessibility Checks
The common design mistake of pairing light text with a light background, why it happens, and how to catch it before it ships.
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How Color Blindness Affects Contrast and Design Choices
How different types of color blindness actually affect color perception, and practical design habits that account for this beyond just contrast ratio.
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Common Contrast Mistakes That Hurt Readability
The most frequent contrast-related mistakes in real-world design work, beyond simple light-on-light text, and how to catch each one.
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Does Contrast Ratio Matter for Non-Text Elements Too?
How WCAG's contrast requirements extend beyond text to icons, buttons, and other UI components, and what the specific threshold is.
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Using a Contrast Checker as Part of Your Design Workflow
Practical ways to build contrast checking into a regular design or development workflow, rather than treating it as an occasional afterthought.
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What 'Large Text' Means for WCAG Contrast Requirements
The exact size and weight thresholds WCAG uses to define 'large text,' and why the distinction affects which contrast ratio applies.
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Why Dark Mode Needs Its Own Contrast Considerations
Why simply inverting a light-mode palette often doesn't produce good dark mode contrast, and practical adjustments that actually work well.
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A Simple Pre-Launch Accessibility Color Checklist
A practical, condensed checklist for reviewing a design's color accessibility before launch, covering the most impactful checks.
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