New Tool Enables 'Brighter than White' Logos via HDR Gain-Map JPEGs

A new tool is enabling designers to break the traditional ceiling of digital color, allowing logos and text to appear physically brighter than the standard white of a screen. The tool, soverybright.com, utilizes HDR JPEG technology to create assets that stand out from the rest of a user interface on compatible high-end hardware.

Using ISO 21496-1 gain maps—grayscale images that instruct HDR software on how to boost specific pixel brightness—the tool can achieve levels up to 7.5x brighter than standard SDR white (#FFFFFF). This equates to approximately +2.9 stops or 1,500 nits of brightness. To ensure these effects persist across different platforms, the tool employs specific technical configurations: it targets Chrome 137+ and Safari 26/iOS 26 for browser rendering and utilizes BT.2100 PQ with matching ICC profiles specifically for LinkedIn, as that platform's image pipeline preserves ICC profiles while stripping other HDR metadata.

The Technical Gap

Standard web colors have long been capped at #FFFFFF, the maximum brightness of the Standard Dynamic Range (SDR) spectrum. While the industry is moving toward a future with CSS Color HDR, that specification remains in draft form, leaving developers without a native CSS method to define colors that exceed standard white.

To bypass this limitation, the tool leverages HDR image content combined with the `background-clip: text` CSS property. By placing an HDR image swatch behind text, designers can create a "glowing" effect that is physically rendered by the hardware rather than simulated through software filters or shadows.

Impact on Digital Branding

This capability introduces a new visual dimension for branding and UI design, particularly for users on hardware like MacBook Pros. It allows brands to create high-contrast, attention-grabbing assets that physically pop against the rest of the interface. Because the technology relies on HDR-capable displays, the experience remains stable for SDR users, who simply see a standard white logo, ensuring the design does not break across different device tiers.

What to Watch

As HDR adoption grows in consumer hardware, the ability to manipulate luminance beyond the SDR cap may become a standard part of the digital brand playbook. However, the current fragmentation of how social networks handle HDR metadata remains a hurdle. While LinkedIn currently preserves the necessary ICC profiles for this effect, other major platforms continue to strip the metadata required for "brighter than white" rendering, leaving the widespread adoption of glowing assets dependent on broader platform support.