Celebrate the double digits with a watercolor rainbow 10th birthday invitation built for a bright tenth birthday party. The card is painted in soft pastel washes — pink, peach, butter yellow, mint, sky and lilac — with a hand-lettered number ten rising over a wide rainbow arch that lands in painted clouds, all scattered with silver sparkle stars and tiny pastel stars. The matching guest page carries the same painted language from top to bottom: a watercolor sky that breathes behind the invitation, drifting watercolor clouds, twinkling four-point sparkles, a six-band rainbow arch that draws itself over the card, a spectrum rail under the live countdown, torn watercolor swatches holding the host's note, a hand-painted map plate with an animated route to the venue, and a reply scene where the arch comes down to earth and the RSVP stands where the name stood. Every fact stays live text so the host can swap the honoree's name, age, date, time, venue and reply-by date without touching the art. The design suits a rainbow party, an over-the-rainbow theme, a pastel garden party, a spring birthday or any milestone celebration for a girl who loves color — pair it with rainbow decorations, pastel balloons, a rainbow layer cake and paint-your-own party favors for a fully coordinated celebration. The invitation prints cleanly, the live countdown keeps guests excited as the day approaches, and the built-in reply buttons make RSVPs effortless for busy families.