hex.tooljo.com — blogLong-form posts on OKLCH, color-mix(), WCAG vs APCA, and modern CSS color.https://hex.tooljo.com/en-usWhy your design system needs OKLCH (and what to actually use it for)https://hex.tooljo.com/blog/oklch-for-design-systems/https://hex.tooljo.com/blog/oklch-for-design-systems/OKLCH gives you something HSL can't: lightness that matches what humans perceive. That sounds abstract. Here's the four concrete things it unlocks for design systems.Tue, 28 Apr 2026 00:00:00 GMTWhy Tailwind v4 rewrote every color in OKLCH (and what it means for your hex codes)https://hex.tooljo.com/blog/tailwind-v4-oklch/https://hex.tooljo.com/blog/tailwind-v4-oklch/Tailwind v4 shipped its entire color palette in OKLCH. The visible result: smoother gradients, evenly-spaced shades, wider gamut on P3 displays. The under-the-hood story: a perceptually-uniform color space replacing two decades of HSL hacks.Mon, 27 Apr 2026 00:00:00 GMT