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A little color. A new perspective.

Published Sep 7, 2026

The Jacket Releases a Sentence

Test in Color Lab

Five colors, endless possibilities. Select a color to copy its HEX.

A mysterious autumn publishing palette of hidden blue, cutout cyan, two jacket greens, and a sharp red registration mark.

The feeling

A folded green book jacket releases one sentence through a square cutout while a red registration notch points toward the hidden colophon

Explore this palette ↓

The mood

A folded jacket holds the page in Hidden Blue until a square of Revealed Paper releases one sentence. Cutout Cyan guides the reading line, while Jacket Green turns the outer fold into a quiet threshold.

Register Red marks one precise notch at the edge. The concealed colophon stays within the blue enclosure, so the identity unfolds through placement, cropping, and a controlled reveal rather than decoration.

How to use it

Use Hidden Blue for the enclosing background with Cutout Cyan for headlines, the emerging sentence, and colophon text. Set Jacket Green as the main folded-panel surface and keep Cutout Cyan for any text placed there.

Use Revealed Paper for the square cutout with Hidden Blue text. Reserve Register Red for the registration notch or a compact label, using Cutout Cyan if it carries words. The 58/29/13 ratio means 58% Hidden Blue background, 29% Jacket Green primary panels, and 13% Revealed Paper highlight; the red notch sits outside this surface split as a very small accent.

What to watch

Cutout Cyan reaches 11.43:1 on Hidden Blue, 5.94:1 on Jacket Green, and 5.62:1 on Register Red. It reaches only 1.09:1 on Revealed Paper, so that pairing fails normal- and large-text AA. Use Hidden Blue on Revealed Paper instead at 10.50:1.

Keep essential text on the original solid, full-opacity HEX colors. Do not place the light cyan sentence on the pale green cutout, and preserve enough empty blue around the reveal for the reading order to remain clear.

A considered balance

Make room for
the right colors.

Use Hidden Blue as the enclosure with Cutout Cyan text. Build the folded jacket in Jacket Green with Cutout Cyan text, and set the Revealed Paper cutout with Hidden Blue text. Keep Register Red to a narrow notch or small panel with Cutout Cyan. Use the original full-opacity HEX colors and a 58/29/13 background-primary-highlight surface ratio.

Start with a generous background, introduce your primary color, then use the highlight sparingly. The ratios are a guide for large surfaces, not a fixed recipe.

58 Base
29 Main
13 Point
Hidden Blue

Background & breathing room

Jacket Green

Cards, graphics & sections

Revealed Paper

Buttons & key signals

Background · Primary · Highlight. Use text and accent colors where their roles call for them.

Text on background
11.43:1 #C9ECEB on #14294F · AAA normal text
Text on primary
5.94:1 #C9ECEB on #365D45 · AA normal text
Text on highlight
1.09:1 #C9ECEB on #CDE3BE · Not suitable for text

Recommended text on highlight

The original text has low contrast (1.09:1). This example uses Hidden Blue (#14294F) from the same palette instead of #C9ECEB on #CDE3BE, improving contrast to 10.50:1. This meets WCAG AA for normal text.

Text on accent
5.62:1 #C9ECEB on #A92235 · AA normal text

Contrast is calculated for these specific pairs. Large text means at least 24 px regular or about 18.7 px bold. Check every pairing in your final design.

IMAGINE THE POSSIBILITIES

One palette.
A world of possibilities.

See how these five colors come together in a website, a poster, a brand, and a presentation. Explore a different palette and watch the mood change.

ONDA STUDIO / WEB PREVIEW
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INDEPENDENT STUDIO · SEOUL

Design with
today’s color.

A little space for fresh ideas. A considered palette for whatever comes next.

Prepared design previews, recolored with this palette.

COLOR NOTE

Cutout Cyan fails normal- and large-text AA on Revealed Paper at 1.09:1. Use Hidden Blue there at 10.50:1. Keep all essential text on solid, full-opacity colors.

From inspiration to creation

Your next idea,
in these colors.

Add a considered color direction to the design you already have in mind. Your layout and instructions stay yours.

  1. Write your design request.
  2. Choose a color guide and copy it.
  3. Paste it after your request.
  4. Review the result and check readability.

Try it in the design or AI tool you already use. 

[Color guide — coloring.today / the-jacket-releases-a-sentence]
Apply this palette to the design requested above. Preserve the requested layout, content, and interactions. If an explicit requirement conflicts with this color guide, identify the conflict instead of silently overriding it.

Text: Cutout Cyan #C9ECEB
Primary: Jacket Green #365D45
Highlight: Revealed Paper #CDE3BE
Accent: Register Red #A92235
Background: Hidden Blue #14294F

Mood: A folded green book jacket releases one sentence through a square cutout while a red registration notch points toward the hidden colophon
Suggested uses: Publishing services
Application note: Use Hidden Blue as the enclosure with Cutout Cyan text. Build the folded jacket in Jacket Green with Cutout Cyan text, and set the Revealed Paper cutout with Hidden Blue text. Keep Register Red to a narrow notch or small panel with Cutout Cyan. Use the original full-opacity HEX colors and a 58/29/13 background-primary-highlight surface ratio.
Avoid: Cutout Cyan fails normal- and large-text AA on Revealed Paper at 1.09:1. Use Hidden Blue there at 10.50:1. Keep all essential text on solid, full-opacity colors.
Use approximately 58% background, 29% primary, and 13% highlight across large surfaces. These ratios are a starting point, not a rigid rule. Use text and accent colors according to their roles.

Keep the original HEX values. Choose readable text/background pairings without silently changing the palette. Do not introduce unrelated colors.

[Color guide — coloring.today / the-jacket-releases-a-sentence]
Apply this palette to the design requested above. Preserve the requested layout, content, and interactions. If an explicit requirement conflicts with this color guide, identify the conflict instead of silently overriding it.

Text: Cutout Cyan #C9ECEB
Primary: Jacket Green #365D45
Highlight: Revealed Paper #CDE3BE
Accent: Register Red #A92235
Background: Hidden Blue #14294F

Mood: A folded green book jacket releases one sentence through a square cutout while a red registration notch points toward the hidden colophon
Suggested uses: Publishing services
Application note: Use Hidden Blue as the enclosure with Cutout Cyan text. Build the folded jacket in Jacket Green with Cutout Cyan text, and set the Revealed Paper cutout with Hidden Blue text. Keep Register Red to a narrow notch or small panel with Cutout Cyan. Use the original full-opacity HEX colors and a 58/29/13 background-primary-highlight surface ratio.
Avoid: Cutout Cyan fails normal- and large-text AA on Revealed Paper at 1.09:1. Use Hidden Blue there at 10.50:1. Keep all essential text on solid, full-opacity colors.
Use approximately 58% background, 29% primary, and 13% highlight across large surfaces. These ratios are a starting point, not a rigid rule. Use text and accent colors according to their roles.

Use these semantic tokens consistently. Keep the original HEX values.
:root {
  --color-text: #C9ECEB;
  --color-primary: #365D45;
  --color-highlight: #CDE3BE;
  --color-accent: #A92235;
  --color-background: #14294F;
}
Background is the canvas, text is readable copy, primary is a key surface, highlight draws attention, and accent adds small secondary details.

[Color guide — coloring.today / the-jacket-releases-a-sentence]
Apply this palette to the design requested above. Preserve the requested layout, content, and interactions. If an explicit requirement conflicts with this color guide, identify the conflict instead of silently overriding it.

Text: Cutout Cyan #C9ECEB
Primary: Jacket Green #365D45
Highlight: Revealed Paper #CDE3BE
Accent: Register Red #A92235
Background: Hidden Blue #14294F

Mood: A folded green book jacket releases one sentence through a square cutout while a red registration notch points toward the hidden colophon
Suggested uses: Publishing services
Application note: Use Hidden Blue as the enclosure with Cutout Cyan text. Build the folded jacket in Jacket Green with Cutout Cyan text, and set the Revealed Paper cutout with Hidden Blue text. Keep Register Red to a narrow notch or small panel with Cutout Cyan. Use the original full-opacity HEX colors and a 58/29/13 background-primary-highlight surface ratio.
Avoid: Cutout Cyan fails normal- and large-text AA on Revealed Paper at 1.09:1. Use Hidden Blue there at 10.50:1. Keep all essential text on solid, full-opacity colors.
Use approximately 58% background, 29% primary, and 13% highlight across large surfaces. These ratios are a starting point, not a rigid rule. Use text and accent colors according to their roles.

Text/background contrast: 11.43:1. This is one measured pair, not a guarantee for the whole palette. Check every actual text/background pairing against WCAG AA. Prefer readable combinations from the original colors, keep visible keyboard focus, and never communicate state through color alone. If no original pairing meets the requirement, propose a separately labeled derived color with its original HEX, proposed HEX, purpose and measured contrast. Never overwrite the source palette.

This guide preserves the original HEX values. Review the output before using it.

Bring it into your project

Five colors.
Ready to use.

Copy the same colors as semantic CSS variables. Every preview and prompt on this page uses this palette. 

:root {
  --color-text: #C9ECEB;
  --color-primary: #365D45;
  --color-highlight: #CDE3BE;
  --color-accent: #A92235;
  --color-background: #14294F;
}

A little more inspiration.

All palettes ↗

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