NEUTRAL · CURATED PAINT RECIPE
How to mix cool gray
A restrained blue-gray for metal, sky, architecture, cool shadows, and interface illustration.
STARTING MIX
7 : 1 : 0.75 : 0.05
Use one consistent unit for every part. For the smallest fractions, scale the entire recipe up instead of estimating a partial drop.
PIGMENT LOGIC
Why this mixture works
The complementary blue and brown pair makes a stable neutral, while the ratio preserves a cool bias. A minute green addition moves the blue away from violet.
The displayed #89939B swatch is an sRGB target, not a promise that every brand will dry to the same color. Pigment identity, tint strength, opacity, medium, surface, and lighting remain part of the result.
BASIC-PALETTE ROUTE
Alternative recipe
Tint a blue-brown chromatic black with white, keeping slightly more blue than brown.
Apply the mixture on the same ground and at the same thickness planned for the final work. Label the wet ratio, wait for a complete dry-down, and compare in neutral light before adjusting.
CORRECTION MAP
How to adjust the result
Add blue for steel, umber for a more neutral concrete gray, or white for pale mist. If it becomes green, correct with a trace of magenta.
Correct value first, then hue, then chroma. This order prevents a lightness error from turning into an unnecessarily complicated recipe.
WATCH FOR
Common mistakes
- Adding blue directly to a finished neutral in a large amount
- Confusing lower value with cooler temperature
- Comparing under warm household light only