Starting color

CastletonGreen

#00563F · rgb(0, 86, 63) · hsl(164, 100%, 17%)

Complementary colors

#005740 · #570017

Analogous colors

#005714 · #005740 · #004257

Triadic colors

#005740 · #400057 · #574000

Split-complementary colors

#005740 · #570042 · #571400

Tetradic colors

#005740 · #140057 · #570017 · #425700

Monochromatic colors

#004d38 · #00a378 · #00ffbb · #5cffd3 · #b3ffeb

Ready-made palettes with CastletonGreen

Complementary palette

The base color paired with its opposite on the wheel for maximum contrast, plus two neutrals and a soft tint.

#00563F · #570017 · #0bcb98 · #f4f4f5 · #18181b

Analogous palette

Neighboring hues on the color wheel create a calm, cohesive scheme with a light tint and a deep shade.

#005714 · #00563F · #004257 · #0bcb98 · #000000

Triadic palette

Three hues spaced evenly around the wheel for a bold, balanced palette anchored by two neutrals.

#00563F · #400057 · #574000 · #f4f4f5 · #18181b

Monochromatic palette

A single hue stepped from light to dark for a clean, elegant and foolproof palette.

#ebfffa · #7affdc · #05ffbc · #00946c · #001f16

Explore CastletonGreen Explore on the color wheelGenerate a palette

If you are wondering what colors go with CastletonGreen, start with its opposite on the wheel — a complementary #570017 — then soften the pairing with the analogous, triadic and monochromatic schemes above.

Frequently asked questions

CastletonGreen's complementary color is #570017. Analogous neighbors, triadic accents and monochromatic tints of the same hue all pair naturally with it too.

Good to know facts

  • Every swatch row is a complete scheme you can copy straight into CSS.
  • The color wheel can regenerate these harmonies for any base you like.

Related tools

These color tools pair naturally with the one you just used — keep exploring.

Color ChartsExplore Tailwind, Material and web-safe reference charts.Color PickerPick, fine-tune and copy any color in HEX, RGB or HSL.Contrast CheckerCheck WCAG AA and AAA contrast ratios instantly.

From the blog

Guides that go deeper into what this tool does.

Rainbow Color Codes: Hex and RGB for Every Shade of the Spectrum
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Rainbow Color Codes: Hex and RGB for Every Shade of the Spectrum

The real hex and RGB codes for all 7 ROYGBIV rainbow colors, why there's no single "official" rainbow, and CSS code to build your own rainbow gradient.

The 60-30-10 Rule: A Simple Formula for Color in Design
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The 60-30-10 Rule: A Simple Formula for Color in Design

The 60-30-10 color rule explained — how to split any palette into a dominant, secondary, and accent color, with real hex codes and CSS for web design.

Tint vs. Shade vs. Tone: What's the Actual Difference?
Color Theory

Tint vs. Shade vs. Tone: What's the Actual Difference?

Tint (+white), shade (+black), and tone (+gray) explained clearly — with a real hex example, CSS code, and where each one actually belongs in design.