So Very Bright

About

A browser-based utility that takes an uploaded logo (PNG, JPEG or WebP), lets you pick which colors should glow, and exports a JPEG carrying an ISO 21496-1 gain map — plus a BT.2100 PQ variant for LinkedIn, which preserves the profile. On HDR displays in software that honors gain maps, the selected pixels render up to 7.5× brighter than #FFFFFF; everywhere else the file behaves as an ordinary JPEG. The site also documents a background-clip: text technique for painting HDR-bright headline text, gated behind the dynamic-range media query.