class

Opal::Theme

Inherits Reference < Object

Represents a semantic color and styling theme for consistent, accessible TUI interfaces.

Constructors

[](name : Symbol | String) : Theme

build(name : String, &block : ThemeBuilder -> Nil) : Theme

Declarative Theme Builder DSL entry point

catppuccin_latte

catppuccin_mocha

current

current=(theme : Theme | Symbol | String) : Theme

cyberpunk

default

dracula

from_brand(name : String, brand : Color | String | Symbol, mode : Symbol = :dark) : Theme

Generates a balanced, harmonious theme from a single brand color and dark/light mode

get(name : Symbol | String) : Theme

gruvbox

high_contrast

monokai

new(name : String, primary : Color, secondary : Color, accent : Color, background : Color, surface : Color, text : Color, text_muted : Color, border : Color, success : Color, warning : Color, danger : Color, info : Color, window_border : Border = Border.rounded, box_border : Border = Border.rounded, glyphs : GlyphSet = GlyphSet.new)

nord

register(theme : Theme) : Theme

solarized_dark

tokyo_night

Class methods

all

find(name : Symbol | String) : Theme | Nil

Instance methods

accent

accent=(accent : Color)

audit_contrast

Audits theme contrast ratios against WCAG 2.1 criteria

background

background=(background : Color)

border

border=(border : Color)

box_border

box_border=(box_border : Border)

danger

danger=(danger : Color)

derive(name : String, primary : Color | String | Symbol | Nil = nil, secondary : Color | String | Symbol | Nil = nil, accent : Color | String | Symbol | Nil = nil, background : Color | String | Symbol | Nil = nil, surface : Color | String | Symbol | Nil = nil, text : Color | String | Symbol | Nil = nil, text_muted : Color | String | Symbol | Nil = nil, border : Color | String | Symbol | Nil = nil, success : Color | String | Symbol | Nil = nil, warning : Color | String | Symbol | Nil = nil, danger : Color | String | Symbol | Nil = nil, info : Color | String | Symbol | Nil = nil, window_border : Border | Symbol | String | Nil = nil, box_border : Border | Symbol | String | Nil = nil, glyphs : GlyphSet | Nil = nil) : Theme

Returns a new theme derived from this theme with selective overrides

ensure_contrast(min_ratio : Float64 = 4.5) : Theme

Adjusts text and primary contrast against background to satisfy minimum WCAG ratio

glyphs

glyphs=(glyphs : GlyphSet)

info

info=(info : Color)

name

primary

primary=(primary : Color)

secondary

secondary=(secondary : Color)

success

success=(success : Color)

surface

surface=(surface : Color)

text

text=(text : Color)

text_muted

text_muted=(text_muted : Color)

warning

warning=(warning : Color)

window_border

window_border=(window_border : Border)