MLightCAD
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    Function acgiContrastingForegroundColor

    Canvas and drawing-display colours that are independent of AcEdUiTheme.

    AcEdUiTheme and the COLORTHEME sysvar drive chrome tokens (CSS variables). This module holds helpers for the CAD viewport:

    • Layout background — MODELBKCOLOR / PAPERBKCOLOR control the canvas clear colour and ACI-7 foreground inversion.
    • UI colour theme — COLORTHEME only affects viewer chrome, not canvas or ACI-7 rendering.

    Shared colour constants and luminance helpers are defined in @mlightcad/graphic-interface (AcGiContext.ts) and re-exported here for editor callers.

    • ACI-7 foreground that contrasts with a light or dark UI theme flag.

      Parameters

      • isLight: boolean

      Returns number

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