tintelligence-color-utils 0.1.1

Utility functions for working with colors (conversion, manipulation, validation).

tintelligence-color-utils

Utility functions for working with colors: conversions, manipulations, family assignment, sorting, and optional Qt helpers.

Installation

pip install tintelligence-color-utils

Optional Qt support

If you need QColor helpers, install with one of the extras:

• PySide6:

  pip install "tintelligence-color-utils[qt_pyside6]"
  

• PyQt6:

  pip install "tintelligence-color-utils[qt_pyqt6]"
  

Quick start

from color_utils import hex_to_hsv, get_color_family

h, s, v = hex_to_hsv("#FF7F00")
print(h, s, v)
print(get_color_family(h, s, v))

API Reference

All functions are available from color_utils top-level import.

Conversion

• hex_to_rgb(hex_code: str) -> tuple[float, float, float]
  • Convert #RRGGBB or RRGGBB to an (r, g, b) tuple in [0, 1]. Raises ValueError on invalid input.
• hex_to_hsv(hex_code: str) -> tuple[float, float, float]
  • Convert a hex color to HSV (h, s, v) where h ∈ [0,1].
• rgb_to_hex(r: int, g: int, b: int) -> str
  • Convert integer RGB (0-255) to #RRGGBB.
• hex_midpoint(c1: str | None, c2: str | None) -> str | None
  • Midpoint between two hex colors as #RRGGBB. Returns None if inputs are invalid.
• rgb_to_lab(r: int, g: int, b: int) -> tuple[float, float, float]
  • Approximate sRGB (D65) to CIE Lab* with L ∈ [0..100].
• normalize_lab(l: float | None, a: float | None, b: float | None) -> tuple[float | None, float | None, float | None]
  • Normalize Lab to [0,1] each. L/100, and a,b via (v+128)/255 when needed.
• rgb_to_hsl(r: int, g: int, b: int) -> tuple[int, int, int]
  • Convert RGB (0-255) to HSL where H ∈ [0..360], S,L ∈ [0..100] (ints).
• lab_to_lch(l: float, a: float, b: float) -> tuple[float, float, float]
  • Convert CIE Lab to LCH(ab) (L, C, H_deg).
• brightness_from_hex(hex_color: str) -> float | None
  • Perceived brightness (Lab L) from a hex color. Higher means brighter.

Color families

• get_color_family(hue: float, saturation: float, value: float) -> str
  • Assign a color family based on HSV, with handling for dark and muted tones. Families include e.g. "Black", "Grey", "White / Off-white", "Red", "Pink", "Orange", "Yellow", "Green", "Turquoise / Teal", "Blue", "Purple / Violet", "Brown", "Unknown".
• color_utils.families.COLOR_FAMILY_ID_ORDER
  • Reusable order loaded from src/color_families.json.

Shades

• get_darker_shades(hex_code: str, steps: int = 2, factor: float = 0.8) -> tuple[str, ...]
  • Generate steps darker hex shades by multiplying V by factor iteratively.

Sorting

• sort_paints_by_color(paints: list[dict], mode: str = "hue") -> list[dict]
  • Sort a list of paint dicts by "hue", "saturation", or "value". Expects hsv_h, hsv_s, hsv_v fields.
• sort_paints_by_family_value_hue(paints: list[dict], order: Literal["bright_to_dark", "dark_to_bright"] = "bright_to_dark") -> list[dict]
  • Group by color_family_id (using COLOR_FAMILY_ID_ORDER), then sort by HSV V in the chosen order, tie-breaking by HSV H. Returns items enriched with _hsv and _family.
• sort_paints_by_family_lab_brightness(paints: list[dict], order: Literal["bright_to_dark", "dark_to_bright"] = "bright_to_dark") -> list[dict]
  • Group by color_family_id (ordered via COLOR_FAMILY_ID_ORDER), then sort by Lab L in the chosen order, tie-breaking by hsv_h if present.

Qt helper (optional)

• color_utils.qcolor.to_qcolor(color) -> QColor
  • Convert a hex string, (r, g, b) tuple, or QColor instance to a QColor. Requires PySide6, PyQt6, or a qt_core.QColor shim. Raises RuntimeError if no QColor is available.

Development

• Python 3.9+
• Install dev deps: pip install -e .[dev]
• Build: python -m build
• Test: pytest

License

MIT