wanderbooks/docs/color-schemes.md

Color schemes in the viewer

The viewer's color-scheme menu (the button in the sidebar's lower corner) offers its own scheme, Wanderbooks Light and Dark, and twenty families of popular editor schemes, each with all its variants: 80 schemes in all (78 and the viewer's own two). The menu's filter narrows the list to light or dark schemes. Families are listed alphabetically, each one's variants too, in as many columns as the window's height needs, so every family is on screen at once; a variant's whole row (its colors and its name) chooses it. Resting the pointer on a variant's row for 50 ms wears it live, to sample schemes without choosing; off the rows, the next one hovered or the scheme in force is worn again, and closing the menu without a click puts back the one in force. Only a click chooses, and only a chosen scheme is kept. The choice is a viewer preference, kept with eframe's other preferences; nothing is written to the books, and no figure or word changes with the scheme (schemes.rs, painted).

Owner, 2026-10-19: "full blown colorscheme support … all the top neovim style colorschemes"; "on the order of 20 families, each with a flyout of all its variants"; a light/dark/all filter; Ayu included.

Where the colors come from

Each scheme's sixteen colors (crates/ledger-gui/src/schemes/table.rs) were taken from its official source and checked value by value (2026-10-19); the table names the source above each family:

Column	What it is
bg	the editor background (Normal)
dim	a panel or sidebar background (mantle, bg_dark, bg0 …)
raised	a raised surface (surface0, bg_highlight, float …); recorded, not used
sel	the visual-selection background; recorded, not used
border	the split or border color; recorded, not used
fg	the text (Normal)
muted	secondary text (subtext, fg_dark, subtle …)
faint	comments
accent	the scheme's signature accent: in most its blue; Ayu's yellow-orange, Dracula's purple, Rosé Pine's iris, Monokai Pro's yellow, Material's teal, Nord's frost cyan (nord8), GitHub's own accent blue
red, green, yellow, orange, blue, purple, cyan	its named colors

Where a scheme has no color for a column, the closest official one stands in (Dracula has no blue: its ANSI blue, its purple; Sonokai has no cyan: its blue; Oxocarbon has no yellow: IBM Carbon's, and no orange: its pink). A few columns repeat another for the same reason: seven schemes have one background (Gruvbox Dark Hard, Nord, Solarized Dark and Light, Cyberdream Dark and Light, Melange Dark), dim being their bg. Variant names are the plugins' own (GitHub Dark Default, not Dark, which is another theme).

How the viewer paints with them

• The page is the darker of a scheme's bg and dim, the cards the lighter, so cards stand out in light and dark schemes alike. A scheme with one background gets a second a shade toward its text: lighter cards in a dark scheme, a darker page in a light one.
• Secondary text is the scheme's muted color, unless that is no dimmer than its text (Nord's documented "subtle" tone is brighter): then a tone between its text and its comments.
• Selection is the cards tinted with the accent; the new-entry highlight is the cards lightly tinted with the yellow (at 10%: a stronger tint left too little room for colored amounts on it, and bleached Nord's red to a pink).
• The charts' series are the scheme's blue, cyan, yellow, purple, orange, green, red and accent, in that order, each that looks like one already taken (CIE76 ΔE under 20) passed over: Monokai Pro and Sonokai name their cyan with their blue, and Kanagawa Dragon's blues, cyans and purples are near one another. The three the charts show together (net, income, spending) are always plainly different.
• Readable, always. Every color that carries text or a figure (text, secondary text, the faintest text, which carries chart amounts and entry numbers, gains, losses, warnings, links) reaches WCAG AA contrast (4.5:1) on every background it is drawn on: page, cards, sidebar, hover, selection, the new-entry highlight, and the soft fills of pills and badges. A scheme's color that falls short keeps its hue and saturation and only gets lighter (dark schemes) or darker (light ones), just far enough. Gains, losses and plain text stay plainly different to the eye (ΔE 20 or more apart). egui's own faint text (placeholders) is the secondary text; the logo's initial is black or white, whichever reads on the accent. The viewer's own palettes go through the same rule (it lifted Wanderbooks Light's green on the sidebar from 4.35:1, its faint text and warnings too, and Wanderbooks Dark's faint text).
• Three levels of text, always apart. Lifted one by one, secondary and faint text came out alike (identical in some schemes, faint above secondary in others). So the faintest is lifted first, then secondary text until it reads at least 1.2 times better than the faint on the ground it reads worst on, then the text the same over secondary.
• The scheme sets both of egui's styles and pins its light or dark theme, so the system turning light or dark later changes nothing.