The prompt: 3 Primary Colours
"Er… please tell me again why you’ve brought me up here, darling?"
Luna turned to look at Rarity with head canted; after a few moments under the Moon Princess’ solemn gaze the unicorn gulped, taking half a step back.
"Er… I mean, Your Highness, of course."
"Fret not," Luna said slowly. "We… I… do not object to familiar terms of endearment. Indeed, your token of affection is a boon."
"I… that is… hm, yes." Rarity nodded, clearing her throat after a moment. Luna smiled tentatively, and Rarity smiled just as tentatively in return before continuing her stately walk up the stairs.
"I wished to present something to you. I fear it isn’t a present one can keep, but I wish to share it with you nonetheless."
Rarity nodded, glancing up as they stepped onto the balcony. Luna’s night was in full glory, a waxing gibbous moon presiding over an endless array of stars, and both mares smiled faintly at the sight of it.
"This is magnificent, dear," Rarity said after a long moment. Luna glanced at her with a tiny smile, watching the stars reflected in large blue eyes a moment before stepping closer, voice dropping to a murmur.
"Do you see those three there? Not far from my moon?"
"Three… let me see." Rarity squinted, looking carefully alongside the moon. Then she gave a delighted squeak, one hoof over her mouth. "Oh! Why, they’re in the precise formation of my cutie mark! Luna, dear, are those new?"
"No," Luna said thoughtfully. "They have ever flanked my moon, but we did not take full note of their presence until quite recently." She glanced at Rarity. "In the same way that you were the last of the Elements we became acquainted with. But they are lovely and seem to command the eyes - is this not so, fair Rarity?"
Rarity nearly squeaked again under that gaze - an impossibly beautiful princess thought that she, Rarity, was fair! - but restrained herself, nodding after a moment.
"I… yes. Enhancing the quite divine beauty of the night."
Luna gave another of her tiny, tentative smiles, and Rarity smiled in return before turning back to the stars.
"Just imagine. Three perfect white diamonds, arranged exactly like my own mark."
"White?" Luna blinked, head tilting, and then smiled. "Ah. I’d forgotten you do not easily see their color." Rarity glanced at her, a tiny hint of a frown between her eyes as the princess continued. "Fair Rarity, the stars are of endless color like the world below. As many as your jewels."
"Oh," Rarity said softly. She turned back to the sky, squinting at the three stars, and Luna’s smile widened as she bent to touch her horn to Rarity’s.
"Here. See them as I do."
Rarity blinked, and by the time she opened her eyes the three stars - her stars, she was beginning to feel - had flashed with brilliant color, their light mingling to creat a shining rainbow. She gasped, speechless a long moment.
"Oh. Oh my. Luna, their light… it’s fantastic, it’s…."
"And perfect color," Luna said softly. "You know the symbolism, don’t you? Yellow - yellow is joy, happiness."
"And jealousy," Rarity mumbled. Dreams of being replaced were still fresh in her mind, and she would have shied away had Luna not moved to maintain contact.
"Think not of that, for yellow is also hope, and imagination like that which you carry, and optimism. Blue, now - blue is harmony, trust, truth. That which brought both of us from the nightmare. And it is peace and tranquility as well, things I wish you." She paused. "Also, that blue one matches your eyes most perfectly."
Rarity smiled at that, eyes lowering, though she raised them again at Luna’s next words.
"And red - red is…"
"I know," Rarity said softly. "Excitement. Energy." She cleared her throat. "Love."
"Yes," Luna said. "And see how their light mingles… the purple of nobility, spirit, and also your mane. The green of your generosity. The orange of your vibrance."
"And orange also demands attention, darling, and we know that’s true as well!”
They both laughed at that. In Rarity’s vision the stars snapped back to cool white as contact was broken, but she felt no loss; instead, she found herself holding Luna’s gaze, warmed by the strange gift and the princess’ praise.
"So, fair Rarity - if ever you need reassurance, look to the stars that echo you… and remember me. I shall show you again if ever you need it."
"Thank you," Rarity said softly, nodding once. Their gazes remained locked a moment longer, and Rarity felt her cheeks heating as Luna finally looked away.
She dismissed it for the time being, settling comfortably at the princess’ side to stargaze. The way she felt under Luna’s eyes could be examined later; tonight was for stargazing, and for reflecting on the splendor she’d been shown.