Ethereum Classic @eth_classic
Block 25,347,544. Era 6, reward 1.6384 ETC, next reduction at block 30,000,000.
hashrate, block 25,347,544, blockscout154 TH/s
Ethereum Classic · identity draft · 2026-09-15
NeoClassic
A visual identity for the Ethereum Classic rebrand
A real thing rendered as a phosphor wireframe on black. One hue, restrained glow, numeric markings and no words. This page turns that into rules for the mark, the colour system, the type and the imagery, and it prints as the PDF.
Drag the hue and chroma above, swap any of the three faces for another Google font, or hit Randomize for a pairing and a hue you would not have picked, and every value on the page follows. Copy link puts the settings in the address so a variant can be shared, and Export tokens copies the resolved values as CSS. Nothing here is final.
The idea
Ethereum Classic is the original Ethereum chain, still secured by proof of work, with a fixed supply and an immutable ledger. The identity says that without saying it. Everything is a blueprint of a real object, drawn in light on a black field, precise enough to measure from. Programmable digital gold, drawn as a blueprint.
Three ideas carry it. Original, so the mark stays the three-part diamond everyone knows and the wordmark stays plain. Measured, so every image carries construction lines and numeric markings, never slogans. Lit from within, so the subject is the only light source and the background stays black, in the same way the network is the thing that matters and the noise around it is not.
The style is defined by a prompt, reproduced in the imagery section, and every render comes from it. The mark is the one on ethereumclassic.org today. The type and the colour ladder are new, and are the parts this page is for.
The mark
One shape, three facets. It is the ETC diamond as drawn on the current website, used as the favicon there. It does not get redrawn. It gets a colour, a clear space and a minimum size.
Clear space
Half the mark's width on every side, measured from the outer points. Nothing else enters that box.
½w½w½w½w
Minimum size
24 pixels tall on screen, 8 millimetres in print. Below that the three facets merge.
Rules
- One colour per instance. Accent, black or white. Never a gradient inside the mark, the glow sits around it.
- Never rotate, skew, outline or add a drop shadow with an offset. A soft glow in the accent is the only effect.
- Never place it on a busy image without the clear space, and never inside another shape.
- The wordmark is Space Grotesk 500, all caps, tracked .08em. It is the only place the display face is set in caps.
Wordmark and lockup
ETHEREUM CLASSIC on one line, never broken. It ships as an outlined SVG so nothing depends on the font. Minimum width is 120 pixels on screen and 30 millimetres in print. Horizontal lockup. Mark on the left, mark height equal to twice the cap height, gap of a quarter of the mark's width, both centred on the mark's middle facet. Stacked lockup. Wordmark below the mark, gap of a quarter of the mark's height, both centred. Clear space for either lockup is half the mark's width on every side, the same as the mark alone. Mark and wordmark are always the same colour.
Colour
One hue drives everything. The accent ladder and the neutrals are all generated from it in OKLCH, so moving the hue recolours the whole system without touching a single hex, and the renders are desaturated and re-tinted with the same hue so imagery and interface never drift apart. There is one scheme. The sliders exist to refine it inside the green band, from lime at 120 to teal at 195, and the values below are what the current setting resolves to.
Accent ladder
050
100
200
300
400
500
600
700
800
900
Neutrals
000
050
100
200
300
500
700
800
950
black
Roles in this mode
Lineage accents
Two more colours exist, and they are the only two. Gold stands for the Bitcoin side of the lineage, proof of work and a fixed supply. Purple stands for the Ethereum side, the EVM and programmability. Between them they say what programmable digital gold means without a word of copy. Both are fixed hues that do not follow the slider, and both are used very sparingly. One marking, one keyword in a heading, one line in a diagram, the two pans of a scale. Never a fill, never a background, never on the mark, never in a render, and never more than one of each on a surface. A page with two gold elements has one too many.
Rules
- Dark mode is the primary register, the one the imagery lives in. Light mode is for documents and long reading.
- One accent per surface. The ladder gives tints and shades of it, not a second colour. The gold and purple lineage accents are the only exceptions, and they are strokes, never surfaces. Red is reserved for errors and appears nowhere else, so the hue band from 10 to 40 degrees is out of bounds for the accent.
- Primary text on the background must clear 7:1. Secondary text and labels clear 4.5:1. The accent as a fill clears 3:1 against the background and the text set on it clears 4.5:1. The readouts above check the current setting.
- Glow is a blur of the accent around a shape, never a lighter fill inside it.
Typography
Three families with three jobs, and any of them can be swapped from the toolbar to try a pairing. The display picker holds sixty-odd candidates, each shown in its own face, and any other Google font can be typed in. The current choice reads . A display face with some engineering in it for headlines, a neutral text face for reading, and a monospace for figures, labels and the numeric markings the imagery is full of. All three are open and on Google Fonts, so nothing depends on a licence.
Space Grotesk
display · headlines, titles, the wordmark · 500 and 600
Grotesque with squared counters, close to blueprint lettering. Already in use in the ethereumclassic.org rebuild.
Inter
text · body, UI, captions · 400 to 600
Neutral and dense, reads at small sizes, disappears behind the content. The workhorse.
JetBrains Mono
mono · figures, labels, code, markings · 400 and 500
Every standalone figure on the page is set in this. Block heights, hashrate, dimensions on a render. It is what makes a figure look measured rather than claimed.
Scale
--t-5xl · 4rem · 600 · -0.02em
Original
--t-4xl · 3rem · 600
Proof of work since genesis
--t-3xl · 2.25rem · 600
Programmable digital gold
--t-2xl · 1.75rem · 600 · h2
Section heading
--t-xl · 1.375rem · 600 · h3
Subsection heading
--t-lg · 1.125rem · 400 · 1.65
Lede paragraph. Ethereum Classic is a proof-of-work smart contract network and the original Ethereum chain. Proof-of-work security from Bitcoin, programmability from Ethereum.
--t-base · 1rem · 400 · 1.65
Body paragraph. The measure is sixty-six characters, the line height is one point six five, and paragraphs are separated by space rather than indents. Links are underlined in the line colour and turn the accent on hover.
--t-sm · .875rem · 500
Small text, buttons and table cells.
--t-sm · .875rem · mono · 400
hashrate 154 TH/s · block 25,347,544 · era 6 · 2026-09-15 · blockscout
--t-xs · .75rem · mono · caps · .1em
Eyebrow and markings
Rules
- Headlines are sentence case, never all caps. Caps are reserved for the mono eyebrow and for the wordmark.
- A figure that stands alone, in a card, a caption or a marking, goes in the mono face with a unit or a date beside it. Figures inside a sentence stay in the text face. A number without a source is not set at all.
- No italics. Emphasis is weight or the accent colour, and rarely.
- Type is never generated inside an image. If a render needs words, the words are set on top of it in these faces.
Imagery
A real subject, drawn as a holographic blueprint on black. One emerald line colour that varies only in intensity, an X-ray of the subject's real construction, faint scanlines and construction lines, small numeric markings, and no readable text anywhere. The prompt below is the definition, and the phosphorize skill in the construct repo renders it.
The mark, rendered
Five takes on the ETC diamond from the mill's library, all in the style. They show its range, a lit crystal on a floor, a dark gem in a HUD frame, a pure wireframe, a neon outline, and a faceted crystal. The wireframe and the outline are the ones that survive at small sizes.
Lady Justice
The reference piece. The original artwork, the 3D model built to match it and served as a hologram viewer at lady-justice.artifacts.classix.dev, and the same subject through the prompt. The third image is also the colour reference every phosphorize render is asked to match.
Do and do not
Do
- Start from a real object or a photograph, so the proportions are true.
- Keep one line colour. Only intensity varies.
- Leave the background near black with the prompt's deep navy, as dark as the reference render and never lifted into haze.
- Use numeric dimension markings and construction lines, sparingly.
- Prefer an unretouched screenshot to a designed card when the screenshot is the evidence.
- Screenshots keep their source watermark, legend and crop. Never phosphorize, recolour or retype a chart or a screenshot. The image is the evidence.
Do not
- Generate text, labels, logos or watermarks inside an image. HUD texture is part of the style, HUD labels are text and are not.
- Drift the hue to cyan, mint or white, or add a second colour.
- Let bloom turn into fog, or fill a surface with solid glow.
- Add circuitry that destroys the subject's real shape.
- Make it cute, cartoon or stylised. Anatomy as in a photograph.
The prompt
Verbatim, as kept in the construct repo at .claude/skills/phosphorize/phosphorize.md. The script fills the subject line and sends the whole thing to the image model, so this text is the style.
loading the prompt…
Applications
The same tokens on the surfaces the identity has to serve. They follow the scheme controls too. Figures on these cards are the chain head on the build date, sourced in the label. Placeholder numbers never ship.
post card, X
server banner, Discord
web card, light or dark
Community call 60
Friday 18 September, 02:00 UTC
Clients, ECIPs, the relaunch of @eth_classic and the OG Discord.
Add to calendarAgendafigure card, dark
Slots
| Slot | Size | What goes in it |
|---|---|---|
| X avatar | 400 x 400 | Mark, accent on black, 60 percent of the side so it survives the circle crop |
| X banner | 1500 x 500 | A render alone. No mark, no words. The avatar covers the bottom left on desktop and phones crop the sides |
| X post image | 1600 x 900 | A screenshot with its source watermark and legend, or a render. Set type only |
| Discord icon | 512 x 512 | Same file as the X avatar |
| Discord banner | 960 x 540 | Render, mark bottom left inside its clear space |
| Open Graph | 1200 x 630 | Render with the mark and one line of set type |
| Shorts and vertical | 1080 x 1920 | Render or clip, captions burned in from the kit |
| Favicon | SVG, 32, 180 | Mark alone, accent on black |
Two more cards
The metric screenshot. An unretouched explorer or dashboard crop, source watermark and legend left in, block height and date set in the mono eyebrow beneath it. This is the weekly format and it needs no design. The upgrade notice. Fork name in display, activation time in UTC and client versions in mono, one link to the release page. Figure cards like the one above are occasional, never the backbone.
Using this
This page is the guideline. The controls at the top change the hue within the green band, the chroma, the mode and the three faces, and every value on the page updates, including the hex readouts, so a scheme can be tried and read off in one place. Copy link writes the settings into the address, so a variant can be sent to someone and opens exactly as set. Export tokens copies the resolved values as a CSS block and downloads the same with the settings as JSON, which is what the website should import. Print or save as PDF from the toolbar to get the document version, which uses light mode and starts each section on a new page.
The source lives in the construct repo under artifacts/neoclassic-identity. The mark is assets/etc-mark.svg, drawn in currentColor so it takes whatever colour it is given. The prompt is assets/phosphorize-prompt.md. The tokens are the top of style.css, and the website should import that block rather than copy values out of it.
Open questions. Where the hue and chroma settle inside the green band, and whether Space Grotesk or something with more edge carries the display role.
NeoClassic · identity draft · built 2026-09-15