First, frame the swatch as the secret weapon they’ll need to stand out before the season—exclusivity is the currency here. Tell them you’re only offering it to a select few and that you’ll hold the right to release it to others after a short window. That creates a hard deadline. Ask for a quick, 15‑minute call, and prepare a one‑page pitch that shows the swatch in three mockup looks, market data, and how it aligns with their brand story. Offer a small, risk‑free trial period—if they love it, you’ll lock in the rest; if not, no hard terms. Keep the tone friendly but firm, remind them that this is a first‑move advantage, and always be ready to shift tactics if they push back. Remember, the faster they decide, the faster you both win.

Sounds solid—go for it, keep that edge sharp, and watch them scramble once they see the numbers.