DatumHueEnterprise v0.0.24datumhue.com
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namespaceTheming7 functions, 1 propertyUI apps only

datumhue.theme

Read, apply, and reset an app's theme, set its control density, and build theme-tracking colors.

Fields 1

FieldTypeAccessDescription
densitytheme.Densityread/writeThis app's control density: the size of its themed text, spacing, corners and controls. Reading gives the effective value: the app's own, else the nearest ancestor's, else the root's. Writing sets this app's own value, which its descendants inherit unless they set their own; themed widgets resize in place on the next frame and theme.metric returns the new values. At "touch" buttons are at least 48 UI px tall. Text sized in rem keeps its size, and a metric the app's theme sets explicitly applies at every density. The root app starts at "touch" in a browser whose primary pointer is coarse, else at "standard". Writing the value the app already set itself changes nothing. A value outside theme.Density raises.

Functions 7

datumhue.theme.default_dark

functionUI apps only
datumhue.theme.default_dark() -> Theme

The built-in dark theme.

In the guide: Theme and density

datumhue.theme.default_light

functionUI apps only
datumhue.theme.default_light() -> Theme

The built-in light theme.

In the guide: Theme and density

datumhue.theme.current

functionUI apps only
datumhue.theme.current(target?: App) -> Theme

The theme currently applied to the app — its own pinned theme, or the one it inherits.

In the guide: Theme and density Messages, events and shared state

datumhue.theme.pin

functionUI apps only
datumhue.theme.pin(theme: Theme, target?: App)

Apply a theme to the app, pinning it so it no longer follows the inherited theme.

Example
datumhue.theme.pin(datumhue.theme.default_light())
print(datumhue.theme.current().name) --> Everforest Light
local viewer = datumhue.app.spawn({
    name = "viewer",
    code = "datumhue.ui.root:label({ text = 'Viewer' })",
})
-- A child spawned from `code` can be managed from the next frame.
datumhue.time.wait_frames(1)
datumhue.theme.pin(datumhue.theme.default_dark(), viewer)
print(datumhue.theme.current(viewer).name) --> Everforest Dark

In the guide: Theme and density

datumhue.theme.unpin

functionUI apps only
datumhue.theme.unpin(target?: App)

Drop the app's pinned theme so it follows the inherited theme again (its nearest themed ancestor, else the default).

In the guide: Theme and density

datumhue.theme.token

functionUI apps only
datumhue.theme.token(token: theme.ColorToken) -> ThemedColor

A theme color token. Pass it as a UI element color to make that slot follow the active theme and repaint automatically on theme change.

In the guide: Make it interactive Add physics Make it a package

datumhue.theme.metric

functionUI apps only
datumhue.theme.metric(token: theme.MetricToken) -> number

The app's current value for a theme metric token — typography sizes and weights, plus spacing. Use a size token as a font_size value or a weight token as a font_weight value to drive text from the theme.

Example
-- Heights are in UI px.
datumhue.theme.density = "standard"
print(datumhue.theme.metric("button_min_height")) --> 32.0
print(datumhue.theme.metric("font_weight_heading")) --> 600.0
datumhue.theme.density = "touch"
print(datumhue.theme.metric("button_min_height")) --> 48.0

In the guide: Theme and density

Types 3

theme.ColorToken

enum
ValueDescription
"panel_background"
"panel_border"
"surface_sunken"
"surface_raised"
"surface_overlay"
"selection_background"
"focus_ring"
"button_normal"
"button_hover"
"button_pressed"
"button_border"
"button_text"
"button_disabled"
"button_text_disabled"
"checkbox_background"
"checkbox_background_checked"
"checkbox_border"
"checkbox_mark"
"slider_track"
"slider_fill"
"slider_thumb"
"radio_border"
"radio_mark"
"scrollbar_track"
"scrollbar_thumb"
"list_row_selected"
"list_row_active"
"input_background"
"input_border"
"input_text"
"input_placeholder"
"input_cursor"
"popover_background"
"popover_border"
"menu_background"
"menu_border"
"text_primary"
"text_secondary"
"text_disabled"
"accent_primary"
"accent_secondary"
"accent_data"
"accent_tertiary"
"success"
"warning"
"error"
"info"
"success_background"
"warning_background"
"error_background"
"info_background"
"accent_tertiary_background"
"statusline_primary"
"statusline_secondary"
"statusline_tertiary"
"chart_axis"
"chart_grid"
"chart_axis_label"
"chart_background"
"chart_legend_background"
"chart_legend_border"
"chart_legend_text"
"syntax_keyword"
"syntax_string"
"syntax_number"
"syntax_comment"
"syntax_function"
"syntax_builtin"

Used by: datumhue.theme.token

theme.Density

enum
ValueDescription
"standard"
"touch"

Used by: datumhue.theme.density

Nested in: events.Density

theme.MetricToken

enum
ValueDescription
"padding_small"
"padding_medium"
"padding_large"
"input_padding_vertical"
"gap_small"
"gap_medium"
"gap_large"
"border_width"
"border_radius"
"font_size_small"
"font_size_normal"
"font_size_large"
"font_size_heading"
"font_size_title"
"font_size_display"
"font_weight_normal"
"font_weight_heading"
"button_min_width"
"button_min_height"
"scrollbar_width"

Used by: datumhue.theme.metric

datumhue.com

(c) 2026 Shuusei AB. Quote excerpts of this manual, with attribution to DatumHue, in your own documentation, tutorials, course materials, reviews, and other writing or video. Republishing it in whole or in substantial part needs written permission: support@datumhue.com.

Victor Mono is licensed under the SIL Open Font License 1.1
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This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL


-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
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