Paint-mixing companion for iPhone
Urcilt Haven app icon

Urcilt Haven: know the mix before you open a tube.

Pick a target color and get recipes in whole parts, ranked by ΔE, chroma and light stability. Oils, acrylics, gouache and watercolor.

Download Urcilt Haven
  • Version 3.0
  • Spectral engine, 400–700 nm
  • Scored by ΔE

Fresh on the store. The listing shows no ratings yet, so early painters shape what others read first.

Three starter mixes from the app

Choose a recipe to carry to the easel

Tap a card, copy the recipe and paste it into your notes. Then download Urcilt Haven to match your own target against your own paint box.

Violet glaze

Lilac glaze, 4 : 2 : 1

Saved recipe, judged under daylight

4 Titanium White · 2 Ultramarine Blue · 1 Quinacridone Magenta
  • Opaque mode
  • Light shift: Steady
  • 50 g batch: 28.6 / 14.3 / 7.1 g
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Close match

Orange terracotta, ΔE 1.1

Recipe 3 from a Quick match run

1 Titanium White · 3 Cadmium Lemon · 3 Burnt Sienna
  • 7 parts in total
  • Burnt Sienna sets the hue
  • Slightly more vivid than the target
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Best match

Terracotta, ΔE 0.6

Tagged Best match and Cleanest

3 Titanium White · 7 Yellow Ochre · 6 Burnt Sienna
  • Graded Exact by the app
  • Three paints, whole parts
  • Split-primary studio box, Daylight
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These are sample mixes taken from the app's own screens. Results on canvas depend on your actual paints and pigments. Nothing here is a payout, prize or cash offer.

Inside the paint box

Six tools that replace trial and error

Every screen in Urcilt Haven answers one question a painter asks at the palette. Here is what each one does.

Quick match

Choose a target and see up to three-paint recipes from your active box. Each is graded Exact or Close and tagged Best match or Cleanest.

The Bench

Mix freely with plus and minus steppers across six ingredient slots. Flip between Opaque and Watercolor and watch value, L*, C* and h update live.

Light shift check

See the same mix under Daylight, Warm lamp and Gallery. A ΔE per source ends in a plain verdict such as Steady.

Tints, shades and tone ladders

Step a mix toward Titanium White, your box's black or a grey of equal value, so a whole value scale is planned in advance.

Gamut reach map

See what share of displayable colors your box covers at Dark, Mid or Light values. Twelve hue bars name your weakest families.

Saved recipes and cards

Keep a note, scale a batch in grams, then save a shareable recipe card to Photos or tweak the mix back on the Bench.

Under the glaze

Wavelength by wavelength: how the engine thinks

Most color tools blend screen pixels. Urcilt Haven models paint. Its full spectral mixing engine uses the same physics as professional color science. It predicts what your pigments will produce together across 400–700 nm, which is why a blue and a yellow behave like paint and not like light.

You can see it on the Bench. The spectral curve of your mix sits in front, with each ingredient's own reflectance curve faintly behind it. White sits high and flat. Ultramarine drops away toward red. Magenta lifts late. The mix is the sum of them.

Ranking is where the numbers earn their place. Quick match scores every candidate by accuracy, simplicity, chroma and stability under different light sources. It returns integer parts, so the recipe you saw is the recipe you can repeat tomorrow.

Verified specifications

App
Urcilt Haven
Version
3.0
Category
Graphics & Design
Platform
iOS, iPhone
Release notes
Maintenance update
Media
Oils, acrylics, gouache, watercolor
Quick match size
Up to 3 paints
Bench slots
6 ingredients
Spectral range
400–700 nm
Light sources
Daylight, Warm lamp, Gallery
Store rating
No ratings yet
Price, size, age
See App Store listing
Page reviewed
14.11.2026
A session at the easel

Plan, mix, keep: the Urcilt Haven routine

Before a tube is opened

  • Pick a color from a reference photo, or dial it in by hand.
  • Run Quick match against the box marked Active.
  • Read Why this mix: which paint sets the hue, what shifts it by degrees, what lifts or deepens value.
  • Send your whole study to the Palette Planner. It finds the smallest set of tubes within a just-noticeable-difference threshold.

Know your box

  • Group paints by color family, such as white, yellow, red, magenta and blue.
  • Check the box's Reach at Dark, Mid and Light.
  • Browse the pigment catalog for the paint that widens your gamut the most.

While you mix

  • Add paints on the Bench and nudge the parts up or down.
  • Use Compare with a color to see how close the mix lands.
  • Read the tint, shade and tone ladders before you commit to a value.
  • Check light shift, then Clear or Save.

After the mix

  • Name the recipe and add a note, such as a cool shadow tone for distant hills.
  • Type a batch size in grams and weigh each paint.
  • Save the recipe card to Photos, or tweak it on the Bench.

Open the box with the numbers already in your hand

Urcilt Haven 3.0 is built for iPhone. Install it from the App Store and run your first Quick match on the next color that stumps you.

Download Urcilt Haven

Requires an iPhone with iOS. Price, in-app purchases, ads, download size and age rating are listed on the App Store page and not stated in our source.