What color is #03572B?

#03572B is a dark, vivid teal-green. In RGB it is rgb(3, 87, 43), and in HSL hsl(149, 93%, 18%).

Is #03572B accessible as text?

On white, #03572B has a contrast ratio of 8.74:1 (passes WCAG AA for body text); on black it is 2.40:1 (fails). For text placed on #03572B, use white for the best readability.

What is the closest Tailwind color to #03572B?

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

What colors go well with #03572B?

#03572B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #59032F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03572B below.

Is #03572B good for buttons?

#03572B works well for buttons and highlights, but use white text on #03572B — black text only reaches 2.40:1, below the 4.5:1 needed for normal-size labels.

Is #03572B the same as CSS darkgreen?

No — #03572B is not the CSS named color darkgreen, but darkgreen (#006400) is the closest CSS named color.

#03572B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03572B

Not just a swatch — here's how #03572B works with other colors. Named schemes with #03572B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #03572B Secondary #4B6C3C Accent #AC6C00 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 #03572B Accent #A8C4BA Surface #E1D9BE Secondary #9AA0A0 Anchor #1A3648

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

Vintage Leather Lead · 5 colors

Lead #03572B Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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.

Berry & Cream Lead · 5 colors

Lead #03572B Surface #F0E8D6 Anchor #612028 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 #03572B Secondary #607565 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.

Build a working theme in the generator →

Color Lab

How #03572B 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 43/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

Moderate

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

Naturalness 98/100

Very high

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

Vintage feel 54/100

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 28/100

Low

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

UI accent fit 71/100

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 78/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03572B

For UI

For branding

For interior

For fashion

People also use #03572B with

Green Dark Slate Gray 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 8.7:1. Use

Subtle surface Use #B9F1D4 for cards and hover fills. Tint 80

Avoid beside #035949 — 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 #03572B 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: #03572B;
  --color-base-rgb: 3 87 43;
  --color-base-oklch: oklch(40.1% 0.103 152.6);
  --color-50: #F0FEF7;
  --color-100: #D8FDEA;
  --color-200: #B1FCD5;
  --color-300: #7CF4B6;
  --color-400: #4CE696;
  --color-500: #29CC78;
  --color-600: #279B5F;
  --color-700: #226D46;
  --color-800: #1A4730;
  --color-900: #122B1E;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F0FEF7',
    100: '#D8FDEA',
    200: '#B1FCD5',
    300: '#7CF4B6',
    400: '#4CE696',
    500: '#29CC78',
    600: '#279B5F',
    700: '#226D46',
    800: '#1A4730',
    900: '#122B1E',
  },
}

$base: #03572B;
$base-ink: #FFFFFF;
$base-50: #F0FEF7;
$base-100: #D8FDEA;
$base-200: #B1FCD5;
$base-300: #7CF4B6;
$base-400: #4CE696;
$base-500: #29CC78;
$base-600: #279B5F;
$base-700: #226D46;
$base-800: #1A4730;
$base-900: #122B1E;
$base-hover: #034724;
$base-subtle: #94EDBF;

{
    "color": {
        "base": {
            "value": "#03572B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF7",
                "type": "color"
            },
            "100": {
                "value": "#D8FDEA",
                "type": "color"
            },
            "200": {
                "value": "#B1FCD5",
                "type": "color"
            },
            "300": {
                "value": "#7CF4B6",
                "type": "color"
            },
            "400": {
                "value": "#4CE696",
                "type": "color"
            },
            "500": {
                "value": "#29CC78",
                "type": "color"
            },
            "600": {
                "value": "#279B5F",
                "type": "color"
            },
            "700": {
                "value": "#226D46",
                "type": "color"
            },
            "800": {
                "value": "#1A4730",
                "type": "color"
            },
            "900": {
                "value": "#122B1E",
                "type": "color"
            }
        }
    }
}

Palettes built on #03572B

Color Lab

Pairs with #03572B

UI roles & guardrails

In real applications

Scales

Every model

Export