colorize hp and sp in casting menu

src/gfx/render_shapes.cpp

@@ -29,6 +29,7 @@ std::map<std::string,sf::Color> colour_map = {
 	{"pink", Colours::PINK},
 	{"yellow", Colours::YELLOW},
 	{"orange", Colours::ORANGE},
+	{"light_blue", Colours::LIGHT_BLUE},
 	{"shadow", Colours::SHADOW},
 	{"title_blue", Colours::TITLE_BLUE},
 	{"navy", Colours::NAVY},

src/gfx/render_shapes.hpp

@@ -57,6 +57,7 @@ namespace Colours {
 	const sf::Color PINK   { 0xff, 0x00, 0x99};
 	const sf::Color YELLOW { 0xff, 0xff, 0x31};
 	const sf::Color ORANGE { 0xff, 0x80, 0x00};
+	const sf::Color LIGHT_BLUE { 0xad, 0xd8, 0xe6 }; // Spell points on dark background
 	// Text colours for shopping / talking
 	// TODO: The Windows version appears to use completely different colours?
 	const sf::Color SHADOW      { 0x00, 0x00, 0x68}; // formerly c[3] QD colour = {0,0,26623} (shop/character name shadow, shop subtitle)