What color is #03540D?

#03540D is a very dark, vivid green. In RGB it is rgb(3, 84, 13), and in HSL hsl(127, 93%, 17%).

Is #03540D accessible as text?

On white, #03540D has a contrast ratio of 9.22:1 (passes WCAG AA for body text); on black it is 2.28:1 (fails). For text placed on #03540D, use white for the best readability.

What is the closest Tailwind color to #03540D?

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

What colors go well with #03540D?

#03540D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #54034A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03540D below.

Is #03540D good for buttons?

#03540D works well for buttons and highlights, but use white text on #03540D — black text only reaches 2.28:1, below the 4.5:1 needed for normal-size labels.

Is #03540D the same as CSS darkgreen?

No — #03540D is not the CSS named color darkgreen, but darkgreen (#006400) is the closest CSS named color.

#03540D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03540D

Not just a swatch — here's how #03540D works with other colors. Named schemes with #03540D in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #03540D Secondary #4C6B3B Accent #AD6B00 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 #03540D 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 #03540D 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 #03540D 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 #03540D Secondary #5C725B 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 #03540D 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 48/100

Neutral

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

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 62/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 100/100

Very high

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

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 70/100

High

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

Surface fit 22/100

Low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03540D

For UI

For branding

For interior

For fashion

People also use #03540D with

Green Castleton Green Deep 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 9.2:1. Use

Subtle surface Use #B8F1BF for cards and hover fills. Tint 80

Avoid beside #035427 — 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 #03540D at work across the surfaces designers actually ship.

Website / UI

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Build faster.

A working theme, generated in seconds.

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: #03540D;
  --color-base-rgb: 3 84 13;
  --color-base-oklch: oklch(38.8% 0.124 143.9);
  --color-50: #F0FEF2;
  --color-100: #D8FDDC;
  --color-200: #B1FCB9;
  --color-300: #7CF48A;
  --color-400: #4CE65E;
  --color-500: #29CC3C;
  --color-600: #279B35;
  --color-700: #226D2B;
  --color-800: #1A471F;
  --color-900: #122B15;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F0FEF2',
    100: '#D8FDDC',
    200: '#B1FCB9',
    300: '#7CF48A',
    400: '#4CE65E',
    500: '#29CC3C',
    600: '#279B35',
    700: '#226D2B',
    800: '#1A471F',
    900: '#122B15',
  },
}

$base: #03540D;
$base-ink: #FFFFFF;
$base-50: #F0FEF2;
$base-100: #D8FDDC;
$base-200: #B1FCB9;
$base-300: #7CF48A;
$base-400: #4CE65E;
$base-500: #29CC3C;
$base-600: #279B35;
$base-700: #226D2B;
$base-800: #1A471F;
$base-900: #122B15;
$base-hover: #02430A;
$base-subtle: #93EC9D;

{
    "color": {
        "base": {
            "value": "#03540D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF2",
                "type": "color"
            },
            "100": {
                "value": "#D8FDDC",
                "type": "color"
            },
            "200": {
                "value": "#B1FCB9",
                "type": "color"
            },
            "300": {
                "value": "#7CF48A",
                "type": "color"
            },
            "400": {
                "value": "#4CE65E",
                "type": "color"
            },
            "500": {
                "value": "#29CC3C",
                "type": "color"
            },
            "600": {
                "value": "#279B35",
                "type": "color"
            },
            "700": {
                "value": "#226D2B",
                "type": "color"
            },
            "800": {
                "value": "#1A471F",
                "type": "color"
            },
            "900": {
                "value": "#122B15",
                "type": "color"
            }
        }
    }
}

Palettes built on #03540D

Color Lab

Pairs with #03540D

UI roles & guardrails

In real applications

Scales

Every model

Export