# Platinum (プラチナ)

> Apple's own name for the default appearance of Mac OS 8, shipped alongside the Appearance Manager, a framework built so the entire look could later be swapped for another. It drains the color out of the interface and works in grays alone, embossing whatever can be pressed and flattening whatever cannot until it merges with the background. The newly thickened window frame was a signal that the window could now be dragged by any edge.

- IndexStyle No.510 — https://indexstyle.org/styles/platinum
- Kind: Style · Family: Apple UI · Era: 1997–2001
- Mood: Trust, Technology, Nostalgia
- Color cues: #D6D6D6 / #EBEBEB / #606060 (cues taken from reference works, not a fixed palette)

## Defining characteristics

- Windows and controls built entirely from desaturated grays
- Live controls carry a bevel and stand up, while disabled ones go flat and sink into the same gray as the background
- Thick molded window frames sitting next to modal dialogs that have almost no frame at all
- A collapse box at the right end of the title bar, and pop up menus raised into buttons with a double triangle

## Best used for

- Rebuilding a late 1990s desktop screen with the period's actual control sizes and spacing intact
- Showing which controls are usable in a dense business application without relying on color, using only whether a surface is raised or flat

## Composition recipe

- Typography & lettering: One small sans serif carries both body text and controls. Hierarchy comes from surface height rather than type size, and bold is reserved for titles and the current selection.
- Layout & structure: Padding inside windows and dialogs is set in fixed pixel counts, and controls stack in a single column aligned to one left rule. Windows get the thick frame and modal dialogs get none.
- Material & texture: Keep three grays (a light face, a base, a dark edge). Build the bevel from a one pixel light line at the top left and a one pixel dark line at the bottom right. For the disabled state, delete both lines and fill with the base gray.

## What to avoid

Hand drawn custom controls do not participate in the system appearance, so they stay stuck in the previous generation's look while everything around them changes.

## Application checklist

Before calling a piece an application of this style, check it against the defining characteristics:

- [ ] Windows and controls built entirely from desaturated grays
- [ ] Live controls carry a bevel and stand up, while disabled ones go flat and sink into the same gray as the background
- [ ] Thick molded window frames sitting next to modal dialogs that have almost no frame at all
- [ ] A collapse box at the right end of the title bar, and pop up menus raised into buttons with a double triangle
- [ ] At least one reference work below has been studied directly
- [ ] The caution above ("What to avoid") has been addressed

## Related styles

- **Aqua (アクア)** — Mac OS X's design language of buttons you want to lick. Jelly gloss, pinstripes, deep shadows and the genie effect staged digital components as objects you could touch, and set the terms for UI throughout the 2000s. What the web made of it with images is Web 2.0 Gloss. → https://indexstyle.org/styles/aqua
- **Luna (ルナ)** — Windows XP's look: blue taskbar, green Start button, rounded windows and a meadow wallpaper repainting the gray office machine as household optimism. → https://indexstyle.org/styles/luna

## Further study

- Mac OS 8 Human Interface Guidelines のレイアウト章にあるピクセル単位の間隔表
- Appearance Manager が Copland から引き継いだテーマ切り替えの構想
- System 7 では対話箱が太枠・窓が細枠だったものが、Mac OS 8 で入れ替わった理由

## Reference works

- Mac OS 8.1 のデスクトップと「このMacについて」 — Wikimedia Commons / CC0 — https://commons.wikimedia.org/wiki/File:Mac%20os%208.1%20interface.png
- Mac OS 9.2.2 上のブラウザ Classilla 9.2 2010 — Wikimedia Commons / CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Classilla-9.2-on-Mac-OS-9.2.2.png
- Rhapsody Developer Release 2 のログイン画面 — Wikimedia Commons / CC0 — https://commons.wikimedia.org/wiki/File:Mac%20os%20rhapsody.png

## Source of record

- MacTech Vol.14 No.01 — Avi Rappoport, Designing Appearance-savvy Applications（Apple『Mac OS 8 Human Interface Guidelines』の解説） — http://preserve.mactech.com/articles/mactech/Vol.14/14.01/Appearance-savvyApps/index.html

## Machine surfaces

- JSON: https://indexstyle.org/api/styles/platinum
- Image-generation prompt (legally clean): https://indexstyle.org/styles/platinum/prompt.txt
- MCP: https://indexstyle.org/mcp (tools: search_styles, get_style, compose_styles; prompts: image-prompt, apply-style)