What color is #15541B?

#15541B is a dark green. In RGB it is rgb(21, 84, 27), and in HSL hsl(126, 60%, 21%).

Is #15541B accessible as text?

On white, #15541B has a contrast ratio of 9.07:1 (passes WCAG AA for body text); on black it is 2.32:1 (fails). For text placed on #15541B, use white for the best readability.

What is the closest Tailwind color to #15541B?

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

What colors go well with #15541B?

#15541B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #56154F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #15541B below.

Is #15541B good for buttons?

#15541B works well for buttons and highlights, but use white text on #15541B — black text only reaches 2.32:1, below the 4.5:1 needed for normal-size labels.

Is #15541B the same as CSS darkgreen?

No — #15541B is not the CSS named color darkgreen, but darkgreen (#006400) is the closest CSS named color.

#15541B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #15541B

Not just a swatch — here's how #15541B works with other colors. Named schemes with #15541B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #15541B 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 #15541B 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 #15541B 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 #15541B 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 #15541B Secondary #5F735F 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 #15541B 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 47/100

Neutral

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

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 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 67/100

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 69/100

High

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

Surface fit 26/100

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 #15541B

For UI

For branding

For interior

For fashion

People also use #15541B with

Fern Green Castleton 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 9.1:1. Use

Subtle surface Use #C5E8C9 for cards and hover fills. Tint 80

Avoid beside #155631 — 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 #15541B 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: #15541B;
  --color-base-rgb: 21 84 27;
  --color-base-oklch: oklch(39.3% 0.109 144.5);
  --color-50: #F2FCF3;
  --color-100: #DEF8E0;
  --color-200: #BEEFC3;
  --color-300: #91DE99;
  --color-400: #67CB71;
  --color-500: #46AF50;
  --color-600: #3C8643;
  --color-700: #2F6034;
  --color-800: #223F25;
  --color-900: #162718;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F2FCF3',
    100: '#DEF8E0',
    200: '#BEEFC3',
    300: '#91DE99',
    400: '#67CB71',
    500: '#46AF50',
    600: '#3C8643',
    700: '#2F6034',
    800: '#223F25',
    900: '#162718',
  },
}

$base: #15541B;
$base-ink: #FFFFFF;
$base-50: #F2FCF3;
$base-100: #DEF8E0;
$base-200: #BEEFC3;
$base-300: #91DE99;
$base-400: #67CB71;
$base-500: #46AF50;
$base-600: #3C8643;
$base-700: #2F6034;
$base-800: #223F25;
$base-900: #162718;
$base-hover: #114516;
$base-subtle: #A7DEAD;

{
    "color": {
        "base": {
            "value": "#15541B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCF3",
                "type": "color"
            },
            "100": {
                "value": "#DEF8E0",
                "type": "color"
            },
            "200": {
                "value": "#BEEFC3",
                "type": "color"
            },
            "300": {
                "value": "#91DE99",
                "type": "color"
            },
            "400": {
                "value": "#67CB71",
                "type": "color"
            },
            "500": {
                "value": "#46AF50",
                "type": "color"
            },
            "600": {
                "value": "#3C8643",
                "type": "color"
            },
            "700": {
                "value": "#2F6034",
                "type": "color"
            },
            "800": {
                "value": "#223F25",
                "type": "color"
            },
            "900": {
                "value": "#162718",
                "type": "color"
            }
        }
    }
}

Palettes built on #15541B

Color Lab

Pairs with #15541B

UI roles & guardrails

In real applications

Scales

Every model

Export