Honda Astral Blue Metallic (B-31M-3) Touch Up Paint

The Look

This color represents a very specific moment in automotive history. Since it only appeared for a single year on the 1987 Accord and Civic, your car carries a finish that was exclusive to the first wave of American-produced Hondas. It is a refined, mid-tone blue that avoids the loud, neon trends of the late eighties. Instead, it offers a cool, professional appearance that feels grounded. Because your car has likely spent decades on the road, the original paint has probably matured, so you should expect a little character in the match. It's a rare shade that marks the beginning of a major era for Honda in the United States.

Technical Details

This is a true metallic finish, which means the paint is packed with tiny flakes that create depth when the sun hits the bodywork. Metallics are sensitive to how you apply them. If you put the paint on too heavy or too fast, the flakes can clump together, leading to a blotchy look known as mottling. This creates dark and light patches that ruin the uniform appearance of the panel. To get the best result, you must use light, even passes. This allows the metallic particles to lay flat and spread out correctly, ensuring the color stays consistent across the entire repair area.

Best Practices

You can find your paint code on the sticker located inside the driver's side door jamb. Before you spray or dab Honda Astral Blue Metallic (check for code B-31M-3), you need to shake the container vigorously for at least sixty seconds. Those metallic flakes are heavy and settle at the bottom quickly. If you don't mix them thoroughly, the color will look off and the finish will lack its signature sparkle. Test the color on the included card before moving to the car to verify the flow and flake distribution. While applying, keep the container moving at a steady pace and allow plenty of drying time between your thin layers to prevent the paint from sagging or trapping moisture.