Question 1

How do I mix a clean green without it going muddy?

Accepted Answer

Use a yellow and a blue that both lean toward green, and keep red out of the mix. A bright, cool result comes from a green-shade yellow (like Hansa Yellow Light) plus a green-shade blue (like Phthalo Blue). Start at roughly 3 parts yellow to 1 part blue, then nudge blue in a little at a time. Green turns muddy when the blue carries red in it (like Ultramarine), because yellow plus blue plus red is the recipe for gray. If you only own a warm yellow and a warm blue, add a touch of white to lift the chroma back up.

Question 2

Why do my mixed colors turn muddy?

Accepted Answer

Muddiness means you have unintentionally mixed all three primaries, which moves the color toward gray. Most muddy mixes happen because one of your two tubes secretly leans toward the third primary. Cadmium Red leans orange, Ultramarine leans purple, and many yellows lean warm. The fix is to pick tubes by their bias, not just their name, and to mix with two pigments where you can. A color with two pigments stays cleaner than the same color built from four.

Question 3

What three paint tubes can mix the most colors?

Accepted Answer

If you are limited to three tubes, choose a magenta, a cyan-leaning blue, and a mid yellow. Magenta plus yellow gives clean oranges and reds. Cyan plus yellow gives clean greens. Magenta plus cyan gives clean violets. A true red, true blue, true yellow set looks intuitive but mixes dull secondaries, which is why printers use magenta and cyan instead.

Question 4

How do I match a specific paint color using tubes I already own?

Accepted Answer

Tell Chromilla which tubes you have, then point it at the target color, and it returns the ratio that uses only those tubes. Chromilla reads a target three ways: your camera, an uploaded photo, or a pasted hex code. It then searches the pigment data for the closest mix your selected brand and tubes can actually reach. You get the tube list, the part-by-part ratio, and a swatch showing how the mix will look once it dries. You are never told to buy a tube you did not select.

Question 5

Can I match a color from a photo or a hex code?

Accepted Answer

Yes. Chromilla accepts a live camera sample, an uploaded image, or a hex value like #3A7D44. For a photo, you tap the exact pixel you want to match, which avoids guessing from a whole image. For a hex code, paste it straight in, which is useful for matching a brand color or a digital reference. The output is the same in every case: tubes, ratio, and a dried-down swatch.

Question 6

How do I darken a color without using black?

Accepted Answer

Darken with the complement of the color, or with a dark transparent pigment, instead of reaching for black. Black dulls chroma and often shifts the hue toward gray-green. To deepen a red, add a little of its complement (a green) or a touch of dark blue. To deepen a yellow, add a small amount of violet or raw umber rather than black. This keeps the shadow color alive instead of flat.

Question 7

Why does my mixed color look different once it dries?

Accepted Answer

Most paints shift in value and chroma as they dry, which is called drydown. Acrylics commonly dry slightly darker than they look when wet. Some watercolors dry lighter and lose a little saturation. This is why a mix that looked perfect on the palette can miss the target on the surface. Chromilla shows a dried-down swatch with the recipe, so you mix to where the color lands, not where it starts.

Question 8

How accurate are the mixing ratios?

Accepted Answer

The ratios are calculated from measured pigment data per brand, not from generic color theory. Each recipe targets the smallest visible difference between your mix and the target, measured as Delta E. A small Delta E means most eyes would call it a match. Chromilla is honest when a target sits outside what your selected tubes can physically reach, instead of pretending every color is mixable. If you are close but not exact, Mix Correction compares your wet swatch to the target and tells you the exact drop to add.

Question 9

Does Chromilla work with my paint brand?

Accepted Answer

Chromilla uses brand-specific catalogs built from verified pigment data, so the ratios match the tubes you actually own. You select your brand, then your tubes, and recipes are generated against that exact set. It supports acrylic, oil, and watercolor, with mixing tips tuned to how each medium behaves. If your brand is not listed yet, the closest verified catalog still gives a workable starting ratio.

Question 10

What is Chromilla?

Accepted Answer

Chromilla is a web-based paint color mixer that turns any color, from a photo, the camera or a hex code, into exact paint-tube ratios for acrylic, oil and watercolor, using Kubelka-Munk pigment mixing and aiming at the color after it dries. Around it sit tools for planning a painting from a photo, building and calibrating your palette, daily mixing practice, and running classes. It is built for painters who want to spend time painting, not guessing at the palette. The tagline is "Color for painters. Honest about paint," because it tells you when a color cannot be reached as readily as when it can. No color theory knowledge is required to use it.

Question 11

What else does Chromilla do besides mixing?

Accepted Answer

Chromilla started as a color mixer and still leads with it. Around the mixer are tools for the rest of the painting: Value Study and Guided Session turn a reference photo into a plan with a mix for every area, Palette Builder and Brand Converter keep recipes inside the tubes you own, Color Gym is a two-minute daily mixing drill, and Session Mode lets a teacher run a class of up to 10 painters from their phones.

Question 12

Do I need to know color theory to use Chromilla?

Accepted Answer

No. Chromilla does the color theory for you and hands back a plain recipe. You pick a color, it gives you tubes and parts, you mix. The contextual tips explain the why if you want to learn, but you can ignore them and still get the mix. This makes it useful for a first-week beginner and a working professional alike.

Question 13

How do I fix a color that is close but slightly off?

Accepted Answer

Use Mix Correction: lay a small wet swatch next to the target and let Chromilla compare them. It reads the gap between your swatch and the target. Then it tells you the exact tube and amount to add to close the gap. This turns nearly right into right without starting the mix over. It is the difference between guessing a correction and measuring one.

Question 14

How much paint do I need to mix?

Accepted Answer

Open Scale this recipe under any recipe and switch to By area. Enter your canvas size, how thick you paint and how much of the painting is in that color, and Chromilla estimates the total with 20% extra so you do not run out. It is an estimate, so mix a little more for large areas of one color.

Question 15

What if I run out of a paint color?

Accepted Answer

Tap the menu on that tube in the recipe and choose “I’m out of this.” Chromilla re-mixes the same color from your remaining tubes and shows how close the new match is when dry. If another tube would get you much closer, it names it.

Question 16

Can Chromilla find the same color in another paint brand?

Accepted Answer

Yes. The free Brand Converter matches paints by their Colour Index pigment code first, so you find the same pigment in another brand. When no brand carries that pigment, it shows the closest color and warns that it will mix differently.

Question 17

What is a value study?

Accepted Answer

A value study, or notan, reduces a reference photo to a few areas of light, middle and dark. Painting those big value shapes first gives a stronger structure before you think about color. The free Value Study tool splits any photo into 3 value zones, or 5 and 7 with Pro.

Question 18

Can Chromilla turn a photo into a step-by-step painting plan?

Accepted Answer

Yes. Chromilla's Guided Session splits your photo into a few big areas, tells you what order to paint them in and gives an exact tube mix for each, in acrylic, oil or watercolor. The breakdown and first two steps are free.

Question 19

Does it work for acrylic, oil and watercolor?

Accepted Answer

Yes. Chromilla supports acrylic, oil and watercolor, and adjusts the recipe for each medium. Watercolor accounts for dilution and dry-down lift, oil accounts for the slower binder and richer gloss, and acrylic accounts for the color shift as it dries.

Question 20

Is Chromilla free to use?

Accepted Answer

10 free mixes without an account, then a free account gives you 10 new colors each calendar month, resetting on the 1st. Re-opening and re-mixing colors you have already mixed is free and does not count. Saved recipes stay readable. Chromilla Pro is unlimited, and adds Mix Correction, Area Sampler, Photo palettes and the Palette Builder. Start with a free 14-day trial (card required), then $8.99/month. Cancel any time before the trial ends and you won't be charged.

Question 21

Does it work on mobile?

Accepted Answer

Yes. Chromilla runs in any modern mobile browser and is designed for use at the easel. Point your phone's camera at a reference, sample a color, and get the recipe instantly. No app install required.

Question 22

How do I mix two paint colors to get a specific color?

Accepted Answer

Start with the dominant hue as 60 to 80% of the mix, then add the second color in 10 to 20% increments until the swatch reads the target. Adjust value last: white to lighten, the complement to darken cleanly. Chromilla returns the exact ratio for any target hex.

Question 23

What colors make brown, beige or skin tones?

Accepted Answer

Brown comes from any two complementary colors: red + green, orange + blue, or yellow + purple. Beige is brown plus Titanium White. Skin tones build from Yellow Ochre + Burnt Sienna + white, shifted warmer or cooler with a touch of red or blue.

Question 24

How do I make a color lighter or darker without changing the hue?

Accepted Answer

Lighten with Titanium White in 5% steps (or water for watercolor). Darken with a small amount of the color's complement before reaching for black: black cools and dulls. If the hue shifts, re-tint with a dot of the original base pigment.

Question 25

How do I mix paint to match a photo or color I see?

Accepted Answer

Photograph under neutral daylight, sample the exact pixel for the hex, then mix the recipe for that hex. Chromilla's Color Extractor pulls hex codes from any photo and the camera sampler reads colors directly from real-world references.

Question 26

What ratio do I use for custom paint colors?

Accepted Answer

Pigments vary in tinting strength by up to 20 times, so 50/50 is rarely right. Start at 4:1 base to modifier and nudge in 10% steps. For tints, expect 80 to 90% white to 10 to 20% color. Chromilla's ratios already account for each pigment's tinting strength.

Question 27

Can I mix different paint brands or finishes?

Accepted Answer

Within the same medium, yes: expect small color shifts because pigment loads differ between brands. Matte + gloss mix to roughly satin. Never combine oil and acrylic in the same wet layer. Pick your brand in Chromilla to recalibrate the recipe for your tubes.

Question 28

How do I fix paint that's muddy, too dark or too bright?

Accepted Answer

Muddy: restart with two pigments plus white. Too dark: lift with Titanium White and re-tint. Too bright: knock saturation back with 1 to 3% of the complement, not black. The Mix Correction tool turns a wet sample plus the target into a one-step correction recipe.

Question 29

How much of each color do I need for a liter of a custom shade?

Accepted Answer

Multiply each percentage by your target volume. For 1 liter of a 70/20/10 recipe, that's 700 ml base + 200 ml modifier + 100 ml white. Mix in batches under 1 L and combine them at the end to even out batch-to-batch variation.

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