Jakub Krehel

Krehel says he originally built oklch.fyi for himself while learning the color model at OpenSea, where the team was considering a color-system migration. He added features and released it publicly. At Interfere, he describes working in a small team with a shared design background, where the challenge is maintaining quality while moving quickly. His personal site connects that daily practice to writing about motion, typography, color and interface behavior.[2][1]

Separating brightness, intensity and hue

oklch.fyi explains color through lightness, chroma and hue, with interactive tools for creating and converting palettes. Separating those dimensions helps a designer adjust a palette more predictably than treating every color as unrelated RGB numbers. The site also explains gamut, the range of colors a display space can represent, and provides visualizers and conversion tools. Its corresponding agent skill adds operations such as contrast checks, gamut clamping and fallback setup to an AI-assisted workflow.[3][5]

Turning interface craft into reusable instructions

Make Interfaces Feel Better covers animation, type, icons, hover states, alignment and hit areas. Krehel’s broader skills collection separates interface review, typography, color, accessibility, layout and product writing into focused workflows. A shared theme is that a generated interface needs decisions at several levels: visual rhythm, the way controls respond and whether people can use them with a keyboard or assistive technology. The skills make those checks available as instructions an agent can apply to an existing project.[4][6]