A 2-session unit for high school. Students paint a still life or portrait in a single hue plus white — no second color allowed. Stripping out hue forces every decision onto value, the quiet workhorse that does most of the job of describing form. Master value in one color first, and full color gets far easier.
One color, white, and a value ramp. With hue removed, every bit of depth in the study is carried by value alone.
Level
Advanced
Grade band
High school
Sessions
2 × 45 min
Total time
90 minutes
Overlay
Square grid
Learning objectives
By the end of the unit, students will:
Explain why painting in a single hue isolates and trains value judgement
Mix an even paint value ramp from one hue and white, controlling each step
Use a grid to map the major value shapes of a reference accurately onto the canvas
Block in large value masses first and refine edges and transitions second
Critique a study by squinting to confirm its value structure holds together
Standards alignment
VA:Cr1.2.HSIaShape an artistic investigation of an aspect of present-day life using a contemporary practice of art or design.
VA:Cr3.1.HSIaApply relevant criteria from traditional and contemporary cultural contexts to examine, reflect on, and plan revisions for works of art and design in progress.
VA:Re7.2.HSIaAnalyze how one's understanding of the world is affected by experiencing visual imagery.
Materials
Internet-connected device per student to grid the reference and use the tool's black-and-white view to check value
One tube of a single dark hue per student — burnt umber, ultramarine, or payne's gray all work well — plus white
Acrylic or gouache, brushes in two or three sizes, a palette, and water
Canvas board or heavy primed paper, plus a pencil and ruler for the light grid
A simple lit still life or a printed high-contrast portrait reference per student
Lesson sequence
1
Mixing a paint value ramp
45 minutes
Warm-up · 5 min
Project a famous full-color painting, then drop it to grayscale with the tool's black-and-white view. Strong paintings still read clearly with the color removed because their value structure is sound. Tell students that today they will work the way many masters underpainted — value first, in one color — before any hue is allowed in.
Main activity · 30 min
(8 min) Students mix a five-step value ramp: pure hue at the dark end, hue plus increasing white toward the light end. Each step must be visibly distinct and evenly spaced — they test on scrap and adjust.
(5 min) They load the reference and switch on the square-grid overlay, then view it in black and white so the values stand out without hue distracting them.
(10 min) Reading values by cell: students mark which of their five ramp steps best matches each major area of the reference — the lightest light, the darkest dark, and the big midtone masses.
(5 min) They rule a light pencil grid on the canvas matching the overlay, and lightly sketch the largest value shapes — not outlines, but the boundaries between light and dark.
(2 min) Students confirm their lightest light and darkest dark are reserved for the right spots so the painting will have full range.
Build a paint ramp, then assign its steps to the reference cell by cell. Painting becomes matching, not guessing.
Reflection · 10 min
Why does removing color make value errors easier to spot?
Where is your reference's darkest dark, and did you reserve a paint step dark enough for it?
What does the grayscale view show you that the color reference hid?
2
Painting the monochrome study
45 minutes
Warm-up · 5 min
One-minute drill: students paint three quick swatches of their hue at light, mid, and dark and hold them up against the reference at arm's length, squinting. Getting the hand calibrated to the value range now saves a dozen corrections later.
Main activity · 30 min
(10 min) Block-in: students cover the canvas quickly with the two or three largest value masses, working dark to light. No detail yet — the goal is to establish the big value pattern so nothing is left white.
(14 min) Refine: students develop the midtones and transitions, softening edges where forms turn and keeping edges crisp where planes meet. They keep checking value against the grayscale reference, not the color one.
(4 min) Accents: the very last touches are the lightest highlight and the darkest accent, placed sparingly so they carry maximum punch.
(2 min) Final squint check against the reference to confirm the value relationships match.
Block-in, refine, then accent. The brightest highlight and darkest dark go in last, so they stay clean and read as the focal notes.
Reflection · 10 min
Did working dark to light help you keep the painting from going muddy? Why?
Where did you place your single brightest highlight, and does it land on the focal point?
Now that value is handled, what would adding color actually need to do here?
The historic payoff: a monochrome underpainting carries all the value, then transparent color glazes are floated on top — value and hue handled separately.
Glaze over grisaille: Advanced students float transparent color glazes over their dried monochrome study, experiencing the classical method where value and color are built in separate passes.
Art history: Research grisaille and underpainting in the work of painters from the Renaissance onward, and why the method survived for centuries.
Differentiation: Students who need support use a three-step ramp and a simple form; advanced students extend to seven steps and a portrait.
Cross-medium: Repeat the study in ink wash, where dilution replaces white, to feel a different route to the same value control.
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