Swatch libraries: Gradients › Holographic adds iridescent foil and glow gradients

Window › Swatch Libraries › Gradients gains Holographic, after Organic
Fades: seven foils (opaque linear gradients of six narrow pastel and
pearl bands with off-center midpoints) and seven glows (radial
gradients from a bright center out to a clear edge), all mixed with the
Perceptual method. They also list in the Swatches panel's library menu,
swatch.library.list/get/add and the Gradient panel's Presets.

The names, colors and stops are VectorCraft's own. A saved preset that
already uses one of the new names is renamed with the first free number
when the preferences load.

Docs: docs/target-app-parity.md Swatches line, ROADMAP.

docs/target-app-parity.md

@@ -1288,7 +1288,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   Double-clicking the Objects on Path tool opens Objects on Path Tool Options ([Objects on Path](https://helpx.adobe.com/illustrator/using/objects-on-path.html)): the nine-point Pivot grid and the Rotate field set the attachment point and angle of the objects attached next, and groups already attached keep theirs; Reset puts the center and 0° back. Save keeps the options across tool switches and saves them with the preferences (`tool.setOption {tool: "objectsOnPath"}`).
 - **Paint and appearance (M3):**
   - **CSS swatch libraries:** fractional linear and radial gradient stop positions are preserved, so nearby stops such as 12.5% and 12.890625% remain distinct instead of collapsing to 13%. Reference: [CSS Images 3 color stops](https://www.w3.org/TR/css-images-3/#color-stop-syntax). The original synthetic regression is `palette_io::tests::css_preserves_fractional_gradient_stop_positions` in `crates/color/src/palette_io.rs`. Scores and hours are unchanged.
-  - **Swatches:** names follow the colour model and are unique; Swatch Options (process/spot, Global, Gray/RGB/HSB/CMYK/Web, live preview); editing a global or spot swatch recolours every linked fill, stroke and text run in one undo step; multi-select and delete with confirmation; New Swatch and New Color Group dialogs (a group from the selected artwork's colours); swatches in colour groups convert, separate and count like any other. The Swatches panel selects ranges and whole groups, has a find field, and drags swatches to reorder, regroup or paint art; Add Used Colors, Select All Unused, Merge, Ungroup and Sort by Kind; a CMYK document keeps applied colours in CMYK. Swatch libraries: nine generated colour libraries, six gradient libraries (Organic Fades among them: soft, perceptually mixed multi-stop fades that thin out to transparent) and a pattern library (Geometric Patterns, whose swatches bring their patterns) in a library panel, saved as `.vcswatches`, `.gpl`, swatch exchange (`.ase`) or CSS, and loaded from `.vcswatches`, `.gpl` and `.ase` files (`.ase` both ways: RGB, CMYK, Lab and Gray; global, spot and process; groups) and from color books (`.acb`, read only: the RGB, CMYK or Lab colors of a book such as a Pantone book a user owns, named with its prefix and suffix, spot unless it says process, #831); `swatch.library.copyToUser` copies a loaded library into the User Defined folder without replacing a file, and a file with the same extension and bytes as a User Defined library opens as that library. Tints of global and spot colours ("Name 40%") stay linked and separate as a percentage of their plate. Spot colours can be defined in Lab (Spot Colors options). A built-in [Registration] swatch prints on every plate.
+  - **Swatches:** names follow the colour model and are unique; Swatch Options (process/spot, Global, Gray/RGB/HSB/CMYK/Web, live preview); editing a global or spot swatch recolours every linked fill, stroke and text run in one undo step; multi-select and delete with confirmation; New Swatch and New Color Group dialogs (a group from the selected artwork's colours); swatches in colour groups convert, separate and count like any other. The Swatches panel selects ranges and whole groups, has a find field, and drags swatches to reorder, regroup or paint art; Add Used Colors, Select All Unused, Merge, Ungroup and Sort by Kind; a CMYK document keeps applied colours in CMYK. Swatch libraries: nine generated colour libraries, seven gradient libraries (among them Organic Fades, soft perceptually mixed multi-stop fades that thin out to transparent, and Holographic, seven opaque linear foils of narrow pastel and pearl bands and seven radial glows that fade out to a clear edge) and a pattern library (Geometric Patterns, whose swatches bring their patterns) in a library panel, saved as `.vcswatches`, `.gpl`, swatch exchange (`.ase`) or CSS, and loaded from `.vcswatches`, `.gpl` and `.ase` files (`.ase` both ways: RGB, CMYK, Lab and Gray; global, spot and process; groups) and from color books (`.acb`, read only: the RGB, CMYK or Lab colors of a book such as a Pantone book a user owns, named with its prefix and suffix, spot unless it says process, #831); `swatch.library.copyToUser` copies a loaded library into the User Defined folder without replacing a file, and a file with the same extension and bytes as a User Defined library opens as that library. Tints of global and spot colours ("Name 40%") stay linked and separate as a percentage of their plate. Spot colours can be defined in Lab (Spot Colors options). A built-in [Registration] swatch prints on every plate.
     Editing, renaming, deleting or merging a global swatch also changes the colors linked to it in graph designs, the art of brushes and the tile that pattern editing's Cancel puts back, in the same undo step as the rest of the art; Default Swatches with replace unlinks them there too.
     Add Used Colors (`swatch.addUsedColors`) and Select All Unused (`swatch.unused`) look colors, swatch names, links, tints and gradients up in hash sets instead of searching every swatch and color for each color or linked paint (New Color Group from artwork too), and New Swatch with several colors (`swatch.new`), New Color Group (`swatch.newGroup`) and Edit Color Group (`swatch.editGroup`) name their new swatches from one set of the names already taken. The new swatches keep their names, order and links, and Select All Unused lists the same swatches. Evidence: `add_used_colors_adds_each_new_color_once_with_free_names`, `add_used_colors_global_links_every_paint_of_a_new_color`, `unused_matches_links_tints_colors_gradients_and_patterns_exactly`, `new_swatches_from_colors_are_numbered_after_names_already_taken`, `new_color_group_numbers_its_colors_after_the_group_and_its_moved_swatches`, `new_color_group_from_artwork_lists_each_color_once_with_free_names` and `edit_color_group_numbers_extra_colors_after_the_names_it_keeps` in `crates/engine/src/tests/swatchcmds.rs`; `free_swatch_names_match_naming_each_swatch_as_it_is_added` and `free_swatch_names_match_new_swatch_names_as_swatches_are_added` in `crates/doc/src/swatches.rs`.
   - **Colorized images (#1466):** a fill color applied to a selected grayscale or 1-bit image (`paint.setFill`) colorizes it with black, white, a process color or a spot color, and refuses a process color when the image has an alpha channel ([Convert color modes](https://web.archive.org/web/20251220223850/https://helpx.adobe.com/illustrator/desktop/manage-colors/select-and-adjust-colors/convert-color-modes.html), "Colorize Grayscale or 1-bit images"); black and white are accepted there too. The canvas draws each pixel in the color as far as the pixel is dark, with white pixels transparent; PDF export writes the image in the color (a spot color as its ink, Registration in every ink) with the image as its soft mask; Separations Preview and printed separations show it on its color's plates; native files keep the color. SVG writes the fill color through a coverage mask (or a colorized PNG in Tiny 1.2); EPS writes binary coverage as an image mask in the color's ink, and a grayscale image as ink samples scaled by coverage, with white pixels left out at Level 3 and gray midtones written over white.