Design a bold corporate milestone graphic in the Format. Use the Color Palette as a confident, high-contrast visual system, with a saturated background and clean white typography. Place the Company Name near the top in a compact, refined sans-serif style. Make the Milestone Headline the dominant element, using very large, tightly arranged type with strong visual hierarchy and generous spacing. Add the Supporting Text below it in a smaller weight. Include subtle darker tonal accents or geometric shapes to create energy without competing with the message. Keep the composition centered, uncluttered and instantly readable on a mobile screen. Render every text field exactly as written, with correct spelling and no additional words. The overall mood should feel celebratory, confident and credible, with crisp edges and a contemporary corporate social media finish.
Use these details:
Company Name: "Northstar Labs"
Milestone Headline: "500,000 customers served"
Supporting Text: "Thank you for being part of the journey"
Color Palette: "vivid red, white and subtle darker red accents"
Format: "4:5 Instagram post"
