Every 24-bit sRGB color
Aster Class presents Spectrum Desk
Make color visible.
Then make it yours.
A hands-on design class with a real finish line. Shape a visual direction, test color and readability, then build and download your own responsive page prototype. Keep working with the free offline Spectrum Desk.
- Windows 10 or 11
- Portable ZIP · 19.7 MB
- Works completely offline
Active color#F05F62RGB 240 · 95 · 98
High ColorAutomatic Sly opening · Aster signature
Live Aster Color Studio
Pick it. Read it. Change the whole room.
The browser lab works immediately. Aster receives the same twelve-palette Sly opening system as the whole estate—automatic, non-repeating, and never another control you have to manage.
RGB240 · 95 · 98
HSL359° · 83% · 66%
On white3.22:1
This opening
High Color
One of twelve shared Sly palettes. A new fresh opening never repeats the last; established sessions rotate every three hours.
The self-guided Aster Class
Give the idea a direction.
Begin with four decisions and a live direction board. Then test harmony, readability, and composition below. No account or upload.
ASTER / LIVE DIRECTIONHigh Color
Confident by design
My next idea
For People discovering this for the first time.
A clear next step ↗Your direction sheet
Selectable, copyable textASTER CLASS / LEARN BY DOING
Push the color.
See what changes.
Three short lessons turn one instinct into a more deliberate visual system. Experiment freely; this stays in your browser.LESSON 01 / HARMONY
Give the lead color company.
Related hues feel cohesive. Opposing hues add tension. Start with a color, then choose how its companions behave.
Select a swatch to copy its HEX value.
LESSON 02 / READABILITY
Make the words earn their place.
Choose any two colors from your palette. The ratio below measures this pair—not the accessibility of a whole page.
LIVE TYPE PROOF
17.80:1AA for normal text ✓AA for large text ✓
WCAG AA asks for at least 4.5:1 on normal text or 3:1 on large text. Size, weight, placement, and the final screen still matter.
LESSON 03 / COMPOSITION
See hierarchy before polish.
Same colors, different priorities. Choose a composition and notice where the headline, promise, and action land.
Editorial favors the story. Product favors the action. Poster favors one unforgettable message.
ASTER / EDITORIAL STUDYMake the
Make the
idea visible.
Color is not decoration. It tells the eye where to go and what to remember.
Explore the work ↗TAKE-AWAY / DESIGN TOKENS
Use it beyond this page.
Copy these CSS variables into a project, or download a small CSS starter. The palette is a starting point; verify contrast again in the finished design.
ASTER CLASS / THE FINAL PROJECT
Make something
real enough to take home.
Choose a starting challenge or bring your own. Shape the story, type, layout, and motion. The preview responds as you work; the handoff is yours to edit. Everything stays on this device.
START WITH
01 / GIVE IT A REASON
What should people remember?
Write for one audience. Lead with what changes for them, then make the next step unmistakable.
No sign-in. No upload. This work is yours.
YOUR LIVE PROJECT
Your next ideaAN ASTER PROJECT
WHO IS THIS FOR?
Give this idea its own voice.
Write a clear promise, and watch this become your project instead of a generic demonstration.
Explore the idea ↗WHY IT MATTERSOne truthful reason this matters.
- Your concrete reasons will appear here.
Preview is an exercise canvas. Your download is a responsive, editable HTML/CSS prototype; add real assets and links before launch.
The complete learning estate
Stay anonymous.
Or carry the work forward.
The public class remains free, local-first, and ready without an account. Learners who want continuity can use a private workspace for progress, capstone review, support, and certification. Authorized teams operate curriculum, cohorts, roles, assets, reporting, and audit history behind server-enforced access.
Enter Aster Academy ↗- 01
Public Class
Immediate lessons, tools, Spectrum Desk, and an editable capstone. No account required.
- 02
Learner Workspace
Optional progress, private reflections, submissions, reviewer feedback, support, and certificates.
- 03
Academy Operations
Protected curriculum, cohorts, instructors, approvals, provenance, reports, permissions, and audit.
The practical half of Aster Class
A color lesson you can keep using.
Spectrum Desk turns Aster Class from an idea into a working creative tool. It saves locally, respects your privacy, and gives you exact color information without sending your work anywhere.
Spectrum DeskOffline · Local-first
RGB#F05F62
Built for actual production
From instinct to exact values.
Exact values that stay in sync
Useful exports for real projects
Readable choices against white or black
Add, replace, remove, undo, redo.
Build up to 128 colors and generate useful harmony sets without losing the choices that got you there.
No account. No cloud. No tracking.
Workspace autosave and palette files remain on your computer. Nothing is transmitted online.
Copy, paste, save, and move precisely.
Use familiar shortcuts, arrow-key picker control, and normal text editing throughout the app.
Free Windows download
Take the whole spectrum home.
The download includes the portable app, source, validation record, production journal, license notices, and integrity manifest.
Download Spectrum Desk v1.0 19.7 MB ↓- 01
Download the ZIP
The complete portable Windows app is included. No account, installer, or subscription.
- 02
Extract the folder
Keep Spectrum Desk.exe and its _internal folder together.
- 03
Open Spectrum Desk
Windows may show an unknown-publisher notice because this independent build is unsigned.
- 04
Build and export
Create palettes, check contrast, then export the format your project needs.
Verify the download
SHA-256
CE8DF39FE3BB41DAE8E1B632FDB1CF2D42AA6CFB46997CC52622D3550C9A9B43