DELIGHTFULDEV

PX to REM & EM Converter

Convert a length between px, rem, and em with the root and parent font-sizes made explicit — so a design handed to you in pixels ships as clean, scalable CSS

HEX, RGB & HSL Colour Converter

Pick a colour or paste a hex code and read the matching rgb() and hsl() at once, with a live swatch — no more hunting for the right notation mid-stylesheet

Aspect Ratio Calculator

Reduce any width×height to its simplest ratio, or lock a ratio and solve for the missing side — for images, video embeds, and CSS aspect-ratio boxes that never distort

WCAG Contrast Ratio Checker

Pair a text and background colour and see the exact contrast ratio with pass/fail for WCAG AA and AAA — a legibility check before it reaches a screen

Viewport Units Calculator

Translate between px, vw, and vh at any viewport size, with device presets — so you know exactly what a vw or vh rule resolves to before you commit it

CSS clamp() Generator

Turn a min size, a max size, and a viewport range into a ready-to-copy fluid clamp() value — smooth responsive scaling between breakpoints, no media queries required

A Practical CSS Learning Roadmap

AI Coding Assistants for CSS: What They Get Right (and Wrong)

Creative CSS: Generative Art and Playful UI

A Front-End Code Review Checklist

CSS clamp() for Fluid Typography and Spacing: A Complete Guide

clamp() replaces a stack of font-size media queries with one line that scales smoothly between a minimum and maximum. Here's the formula, worked examples, and common pitfalls.

CSS Viewport Units Explained: vw, vh, dvh, svh, and lvh for Responsive Design

100vh has a famous mobile bug: the address bar resizing the viewport out from under your layout. The newer dvh/svh/lvh units exist specifically to fix it.

WCAG Color Contrast Explained: How to Pass AA and AAA (With Real Examples)

WCAG's contrast rules aren't arbitrary — they're a ratio computed from relative luminance. Here's the actual math, the thresholds that matter, and the failures that show up most.

The CSS aspect-ratio Property: A Practical Guide to Responsive Media Boxes

Before aspect-ratio, holding a box's shape as it resized meant a padding-percentage hack. Here's the modern property, common ratios, and how it prevents layout shift.

Hex vs RGB vs HSL: Choosing the Right CSS Color Format

Hex, RGB, and HSL can all describe the exact same color — the difference is which one is easiest to read, tweak, and reason about for a given job. Here's how to pick.

Px vs Rem vs Em: A Complete Guide to CSS Units (And When to Use Each)

Px, rem, and em all size things on the web, but they behave differently under zoom, nested components, and a user's font-size preference. Here's exactly when to reach for each.