Aqua vs Platinum
アクア / プラチナ
Both sit in Apple UI, so the question is not what they belong to but how they behave. Both are read here as style. They are reached for with different intent, which is the fastest way to tell them apart.
Aqua
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.
Platinum
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.
| Aqua | Platinum | |
|---|---|---|
| Era | 2000–2014 | 1997–2001 |
| Family | Apple UI | Apple UI |
| Kind | Style | Style |
| Cues | Gel-gloss buttons / Pinstriped grounds / Deep drop shadows / Metaphors of water and light | 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 | Recreating 2000s digital culture with the texture it actually had · Making what is clickable read at once as a pressable object | 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 |
| Type | No shadow on text, weighted to stay legible over gloss | 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. |
| Composition | Components evenly spaced, gaps left for shadows to fall into | 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 | A hard white highlight above, reflection and deep shadow below | 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. |
| Caution | Gloss and shadow applied evenly to every component hides what is actually pressable, leaving texture where hierarchy should be. | 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. |