How to Mix Cool Grey in Acrylic

A grey with a soft blue lean. The colour of overcast light. This guide gives you the pigment ratios that land on #7C858F in acrylic, using the same solver that powers the Chromilla mixer.

Target

Cool Grey

#7C858F

Mixed result

90% match

From these pigments

#738796

Pigment recipe

Checked August 2026

Ratios calibrated for acrylic. Start with the dominant pigment, add the modifiers in the order below, and adjust in 5% steps to your target swatch.

1. Titanium White
PW6
51%
2. Ultramarine Blue
PB29
43%
3. Burnt Sienna
PBr7
6%

What colors make Cool Grey?

Titanium White, Ultramarine Blue, and Burnt Sienna, in roughly a 51:43:6 ratio.

How to make Cool Grey in acrylic

Start with Titanium White at about 51% as your acrylic base, then work in Ultramarine Blue and Burnt Sienna in the order above. Adjust in 5% steps until the swatch reads #7C858F.

Why mix Cool Grey instead of buying it

Mixing Cool Grey yourself lets you approximate an expensive or hard to find tube from pigments you already own, match Cool Grey across paint brands whose factory tubes differ, and rebuild the exact color when you run out mid painting. The recipe above is the working starting point.

Common mistakes

White cools and chalks a mix as you add it, so tint in small steps and stop before it goes pastel.

Get this recipe for your paint brand

Open the live mixer with Cool Grey + acrylic pre-loaded and calibrate to your tubes.

Open in mixer

Related mixing guides

Pigment mixing is subtractive, so small ratio changes matter. The mixer refines this recipe to your brand and updates on the fly.