Blushing matches blood color (#95074)

## About The Pull Request

Blushing's color is generated from blood color, so lizards have green
blushing and whatnot.

<img width="102" height="90" alt="image"
src="https://github.com/user-attachments/assets/b206b29c-f8a8-4dc4-b091-8d7e8f080fc3"
/>

## Why It's Good For The Game

Blushing is when you get more blood in yo face so it wouldn't make sense
to be red(pink) for people without red blood.

## Changelog

🆑 Melbert
qol: Blushing matches blood color, so lizards blush greeeen.
/🆑

code/datums/bodypart_overlays/emote_bodypart_overlay.dm

@@ -63,6 +63,19 @@
 	offset_key = OFFSET_FACE
 	attached_body_zone = BODY_ZONE_HEAD
 
+/datum/bodypart_overlay/simple/emote/blush/color_image(image/overlay, layer, obj/item/bodypart/limb)
+	var/base_color = limb.owner?.get_bloodtype()?.get_damage_color()
+	if(!base_color)
+		return ..()
+
+	var/list/blood_hsl = rgb2num(base_color, COLORSPACE_HSL)
+	//  take blood color then just make it a lot brighter and desaturate it a bit
+	blood_hsl[2] = max(0, blood_hsl[2] - 20)
+	blood_hsl[3] = min(100, blood_hsl[3] + 30)
+
+	overlay.color = rgb(blood_hsl[1], blood_hsl[2], blood_hsl[3], space = COLORSPACE_HSL)
+	overlay.alpha = 200
+
 /datum/bodypart_overlay/simple/emote/cry
 	icon_state = "tears"
 	draw_color = COLOR_DARK_CYAN