Cal.com.
Open-source scheduling. Clean neutral UI, developer-oriented simplicity.
Palette sample
First 5 hex codes lifted from the DESIGN.md color sections. The full palette and roles live in the source spec.
#242424 #898989 #111111 #ffffff #0099ff Visual theme
Cal.com's website is a masterclass in monochromatic restraint — a grayscale world where boldness comes not from color but from the sheer confidence of black text on white space. Inspired by Uber's minimal aesthetic, the palette is deliberately stripped of hue: near-black headings (`#242424`), mid-gray secondary text (`#898989`), and pure white surfaces. Color is treated as a foreign substance — when it appears (a rare blue link, a green trust badge), it feels like a controlled accent in an otherwise black-and-white photograph.