What color is #00563B?

Castleton Green (#00563B) is a very dark, vivid teal-green. In RGB it is rgb(0, 86, 59), and in HSL hsl(161, 100%, 17%).

Is #00563B accessible as text?

On white, #00563B has a contrast ratio of 8.77:1 (passes WCAG AA for body text); on black it is 2.39:1 (fails). For text placed on #00563B, use white for the best readability.

What is the closest Tailwind color to #00563B?

The nearest Tailwind CSS token is green-900 (#0D542B).

What colors go well with #00563B?

#00563B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #57001B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #00563B below.

Is Castleton Green good for buttons?

Castleton Green works well for buttons and highlights, but use white text on #00563B — black text only reaches 2.39:1, below the 4.5:1 needed for normal-size labels.

Is Castleton Green a CSS named color?

No — Castleton Green is not a standard CSS named color; use the hex value #00563B in CSS. The closest CSS named color is darkslategray, but only by numeric distance — darkslategray is a different color family, not a true match.

Castleton Green (#00563B) Color Palette, HEX, RGB & Design Ideas

Palettes built on Castleton Green

Not just a swatch — here's how Castleton Green works with other colors. Named schemes with Castleton Green in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #00563B Secondary #496C3E Accent #AB6D00 Surface #EEEAD6 Anchor #3C2F20

Castleton Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Coastal Morning Lead · 5 colors

Lead #00563B Accent #A7C4BB Surface #E1D9BE Secondary #9AA0A0 Anchor #1B3548

Castleton Green opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #00563B Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 Anchor #2D3236

Castleton Green keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #00563B Secondary #744F1A Surface #E5DBC0 Accent #3B5141 Anchor #5B2320

Castleton Green plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #00563B Secondary #5F756A Support #989286 Ink #17140F

Castleton Green is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Castleton Green carrying the quiet middle.

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Color Lab

How Castleton Green actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 40/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 68/100

High

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 55/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 23/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 66/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 33/100

Low

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with Castleton Green

For UI

For branding

For interior

For fashion

People also use Castleton Green with

Green Prussian Blue Oxblood Platinum Dark Slate Gray

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 8.8:1. Use

Subtle surface Use #B6F3E0 for cards and hover fills. Tint 80

Avoid beside #005557 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is Castleton Green at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #00563B;
  --color-base-rgb: 0 86 59;
  --color-base-oklch: oklch(40.1% 0.086 163.7);
  --color-50: #F0FEFA;
  --color-100: #D8FDF1;
  --color-200: #B1FCE4;
  --color-300: #77F8CF;
  --color-400: #46ECB7;
  --color-500: #22D29B;
  --color-600: #239F78;
  --color-700: #1F7056;
  --color-800: #184839;
  --color-900: #112C24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F0FEFA',
    100: '#D8FDF1',
    200: '#B1FCE4',
    300: '#77F8CF',
    400: '#46ECB7',
    500: '#22D29B',
    600: '#239F78',
    700: '#1F7056',
    800: '#184839',
    900: '#112C24',
  },
}

$base: #00563B;
$base-ink: #FFFFFF;
$base-50: #F0FEFA;
$base-100: #D8FDF1;
$base-200: #B1FCE4;
$base-300: #77F8CF;
$base-400: #46ECB7;
$base-500: #22D29B;
$base-600: #239F78;
$base-700: #1F7056;
$base-800: #184839;
$base-900: #112C24;
$base-hover: #00452F;
$base-subtle: #8FF0D1;

{
    "color": {
        "base": {
            "value": "#00563B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEFA",
                "type": "color"
            },
            "100": {
                "value": "#D8FDF1",
                "type": "color"
            },
            "200": {
                "value": "#B1FCE4",
                "type": "color"
            },
            "300": {
                "value": "#77F8CF",
                "type": "color"
            },
            "400": {
                "value": "#46ECB7",
                "type": "color"
            },
            "500": {
                "value": "#22D29B",
                "type": "color"
            },
            "600": {
                "value": "#239F78",
                "type": "color"
            },
            "700": {
                "value": "#1F7056",
                "type": "color"
            },
            "800": {
                "value": "#184839",
                "type": "color"
            },
            "900": {
                "value": "#112C24",
                "type": "color"
            }
        }
    }
}

Palettes built on Castleton Green

Color Lab

Pairs with Castleton Green

UI roles & guardrails

In real applications

Scales

Every model

Export