hermes.x — brand kit

The name

In English the product is Hermes — after the Greek god of messengers, travellers, and crossings. In modern Greek the same name is Ermis (Ἑρμῆς). Written form is always Hermes outside Greek contexts.

The keyboard shortcut inside Theseus is Ctrl+Shift+E — E for Ermis, off the collision path with Chrome's own Ctrl+Shift+M.

The mark

A tilted envelope with three speed-trails on the back edge — a letter mid-flight. Monochrome, scales from 16 px (sidebar icon) to 160 px (hero) without legibility loss. SVG uses currentColor so it inherits whatever text colour it sits in.

16 px — stroke variant (one trail)

32 px — standard (3 tapered trails)

64 px — in-panel

on sky background

⬇️ mark.webp (main — the signin / top-bar icon) ⬇️ mark-wings-both.webp (variant — full upper + lower wings)

Do	Don't
Keep the envelope tilted ~22°, trails on the back-left.	Mirror the mark or tilt it the opposite direction.
Let the mark inherit text colour (currentColor).	Hard-code a colour inside the SVG; it limits reuse.
Use the stroke variant below 24 px display size.	Scale the standard mark below 20 px — trails merge.
Pair with the wordmark "hermes.x" when context is unclear.	Apply to a product with a different protocol or trust model.

Palette

Hermes rides on a sky-blue primary — fast, airborne, legible on both dark and light. The deep navy background is the natural pairing; the dim tones are for muted type.

bg#0b0e14 — primary surface

panel#141a24 — cards, sidebar

sky#38BDF8 — primary accent (mark)

sky-soft#60A5FA — hover, secondary

sky-deep#0EA5E9 — pressed / active

orange#FF6D00 — alternate accent

orange-light#FF8C1A — hover, secondary

orange-deep#E65100 — pressed / active

ink#e7eaf1 — body text

mut#8b98a9 — muted text

warn#ffc75f — warnings, unread accents

Voice

Blunt about limits. "Relays still see recipient and timing" is the tone, not "fully anonymous messaging". Say what the design does and does not solve.
No evangelism about Nostr. Nostr is the transport, not the product. Mention it where it matters (relays, pubkeys, NIP-17) and don't elsewhere.
"Message by name" is the one-line pitch. Everything else is supporting detail.
Lowercase for product nouns in body copy. hermes.x, messenger, panel. Capital Hermes for titles and the first mention per page.

Attribution + reuse

Mark + palette are MPL-2.0 along with the rest of the Hermes client source. Use for reviews, press, interoperability docs and the client's own chrome. Don't apply to products that aren't actually Hermes (forks with different protocols or trust models included).