What color is #09511C?

#09511C is a dark, vivid green. In RGB it is rgb(9, 81, 28), and in HSL hsl(136, 80%, 18%).

Is #09511C accessible as text?

On white, #09511C has a contrast ratio of 9.52:1 (passes WCAG AA for body text); on black it is 2.21:1 (fails). For text placed on #09511C, use white for the best readability.

What is the closest Tailwind color to #09511C?

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

What colors go well with #09511C?

#09511C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #53093F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #09511C below.

Is #09511C good for buttons?

#09511C works well for buttons and highlights, but use white text on #09511C — black text only reaches 2.21:1, below the 4.5:1 needed for normal-size labels.

Is #09511C the same as CSS darkgreen?

No — #09511C is not the CSS named color darkgreen, but darkgreen (#006400) is the closest CSS named color.

#09511C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #09511C

Not just a swatch — here's how #09511C works with other colors. Named schemes with #09511C in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #09511C Secondary #4C6B3C Accent #AD6C00 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.

Vintage Leather Lead · 5 colors

Lead #09511C Secondary #754E1B Surface #E6DBC0 Accent #3C5140 Anchor #5B2322

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.

Modern Café Dominant · 5 colors

Dominant #09511C Anchor #392B1E Surface #EDE4D0 Accent #879B6D Secondary #3A3833

Castleton Green anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Berry & Cream Lead · 5 colors

Lead #09511C Surface #F0E8D6 Anchor #612029 Accent #E5C3BA Secondary #342B2C

Castleton Green sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #09511C Secondary #5B6F5D 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 #09511C 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 46/100

Neutral

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

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

Naturalness 100/100

Very high

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

Vintage feel 52/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 29/100

Low

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

UI accent fit 65/100

High

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

Surface fit 28/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #09511C

For UI

For branding

For interior

For fashion

People also use #09511C with

Green Brunswick Green Tyrian Purple Platinum Hunter Green

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 9.5:1. Use

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

Avoid beside #095335 — 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 #09511C 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: #09511C;
  --color-base-rgb: 9 81 28;
  --color-base-oklch: oklch(38.1% 0.107 146.9);
  --color-50: #F1FEF4;
  --color-100: #D9FCE3;
  --color-200: #B6F7C7;
  --color-300: #84EBA0;
  --color-400: #57DB7A;
  --color-500: #34C15A;
  --color-600: #2F934A;
  --color-700: #276838;
  --color-800: #1D4427;
  --color-900: #14291A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F1FEF4',
    100: '#D9FCE3',
    200: '#B6F7C7',
    300: '#84EBA0',
    400: '#57DB7A',
    500: '#34C15A',
    600: '#2F934A',
    700: '#276838',
    800: '#1D4427',
    900: '#14291A',
  },
}

$base: #09511C;
$base-ink: #FFFFFF;
$base-50: #F1FEF4;
$base-100: #D9FCE3;
$base-200: #B6F7C7;
$base-300: #84EBA0;
$base-400: #57DB7A;
$base-500: #34C15A;
$base-600: #2F934A;
$base-700: #276838;
$base-800: #1D4427;
$base-900: #14291A;
$base-hover: #074217;
$base-subtle: #9AE6AE;

{
    "color": {
        "base": {
            "value": "#09511C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF4",
                "type": "color"
            },
            "100": {
                "value": "#D9FCE3",
                "type": "color"
            },
            "200": {
                "value": "#B6F7C7",
                "type": "color"
            },
            "300": {
                "value": "#84EBA0",
                "type": "color"
            },
            "400": {
                "value": "#57DB7A",
                "type": "color"
            },
            "500": {
                "value": "#34C15A",
                "type": "color"
            },
            "600": {
                "value": "#2F934A",
                "type": "color"
            },
            "700": {
                "value": "#276838",
                "type": "color"
            },
            "800": {
                "value": "#1D4427",
                "type": "color"
            },
            "900": {
                "value": "#14291A",
                "type": "color"
            }
        }
    }
}

Palettes built on #09511C

Color Lab

Pairs with #09511C

UI roles & guardrails

In real applications

Scales

Every model

Export