Feat: add support for hex color in color component (#4493)

* Feat: add support for hex color in color component

* Chore: move hex color validator to color component

* Chore: add test

* Chore: fix formatting

* Chore: make linter happy

* Chore: make linter happy

* Fix: parse correct offsets

Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>

* Chore: use cv.Invalid

* Fix: remove # because it indicates a comment in yaml

* Fix: only allow hex if no other color value is set

* Fix: tests

* Fix: mutual exclusion of raw and hex colors

* Chore: format file

* Update __init__.py

---------

Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/color/__init__.py

@@ -10,8 +10,20 @@ CONF_RED_INT = "red_int"
 CONF_GREEN_INT = "green_int"
 CONF_BLUE_INT = "blue_int"
 CONF_WHITE_INT = "white_int"
+CONF_HEX = "hex"
 
-CONFIG_SCHEMA = cv.Schema(
+
+def hex_color(value):
+    if len(value) != 6:
+        raise cv.Invalid("Color must have six digits")
+    try:
+        return (int(value[0:2], 16), int(value[2:4], 16), int(value[4:6], 16))
+    except ValueError as exc:
+        raise cv.Invalid("Color must be hexadecimal") from exc
+
+
+CONFIG_SCHEMA = cv.Any(
+    cv.Schema(
         {
             cv.Required(CONF_ID): cv.declare_id(ColorStruct),
             cv.Exclusive(CONF_RED, "red"): cv.percentage,
@@ -23,10 +35,17 @@ CONFIG_SCHEMA = cv.Schema(
             cv.Exclusive(CONF_WHITE, "white"): cv.percentage,
             cv.Exclusive(CONF_WHITE_INT, "white"): cv.uint8_t,
         }
-).extend(cv.COMPONENT_SCHEMA)
+    ).extend(cv.COMPONENT_SCHEMA),
+    cv.Schema(
+        {
+            cv.Required(CONF_ID): cv.declare_id(ColorStruct),
+            cv.Required(CONF_HEX): hex_color,
+        }
+    ).extend(cv.COMPONENT_SCHEMA),
+)
 
 
-async def to_code(config):
+def from_rgbw(config):
     r = 0
     if CONF_RED in config:
         r = int(config[CONF_RED] * 255)
@@ -51,6 +70,16 @@ async def to_code(config):
     elif CONF_WHITE_INT in config:
         w = config[CONF_WHITE_INT]
 
+    return (r, g, b, w)
+
+
+async def to_code(config):
+    if CONF_HEX in config:
+        r, g, b = config[CONF_HEX]
+        w = 0
+    else:
+        r, g, b, w = from_rgbw(config)
+
     cg.new_variable(
         config[CONF_ID],
         cg.StructInitializer(ColorStruct, ("r", r), ("g", g), ("b", b), ("w", w)),

tests/test1.yaml

@@ -2528,6 +2528,8 @@ color:
     red: 0%
     green: 1%
     blue: 100%
+  - id: kbx_green
+    hex: "3DEC55"
 
 display:
   - platform: lcd_gpio