# Spectral — Upstream Source Investigation

**Family**: Spectral
**Designer**: Production Type
**Date Added**: 2017-10-10
**Category**: Serif
**Model**: Claude Opus 4.6

## Source Repository

The upstream source was located at:

- **Repository**: https://github.com/productiontype/Spectral
- **Commit**: `dbc06862d7030eedb1b01b60cdad8f6102f4ddfa`
- **Branch**: main

## Font Files

The family was published as 14 static fonts covering seven weights (ExtraLight through ExtraBold) in upright and italic variants:

- `Spectral-ExtraLight.ttf`, `Spectral-ExtraLightItalic.ttf`
- `Spectral-Light.ttf`, `Spectral-LightItalic.ttf`
- `Spectral-Regular.ttf`, `Spectral-Italic.ttf`
- `Spectral-Medium.ttf`, `Spectral-MediumItalic.ttf`
- `Spectral-SemiBold.ttf`, `Spectral-SemiBoldItalic.ttf`
- `Spectral-Bold.ttf`, `Spectral-BoldItalic.ttf`
- `Spectral-ExtraBold.ttf`, `Spectral-ExtraBoldItalic.ttf`

## Subsets

The family covered the following subsets: cyrillic, cyrillic-ext, latin, latin-ext, vietnamese.

## Notes

Spectral was designed by Production Type and published to Google Fonts on 2017-10-10. The same upstream repository also housed the Spectral SC (Small Caps) companion family. The family offered broad multilingual coverage including Cyrillic and Vietnamese scripts.
