What color is #155100?

#155100 is a very dark, vivid green. In RGB it is rgb(21, 81, 0), and in HSL hsl(104, 100%, 16%).

Is #155100 accessible as text?

On white, #155100 has a contrast ratio of 9.51:1 (passes WCAG AA for body text); on black it is 2.21:1 (fails). For text placed on #155100, use white for the best readability.

What is the closest Tailwind color to #155100?

The nearest Tailwind CSS token is lime-900 (#35530E).

What colors go well with #155100?

#155100 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3C0052. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #155100 below.

Is #155100 good for buttons?

#155100 works well for buttons and highlights, but use white text on #155100 — black text only reaches 2.21:1, below the 4.5:1 needed for normal-size labels.

Is #155100 the same as CSS darkgreen?

No — #155100 is not the CSS named color darkgreen, but darkgreen (#006400) is the closest CSS named color.

#155100 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #155100

Not just a swatch — here's how #155100 works with other colors. Named schemes with #155100 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #155100 Secondary #4D6B3B Accent #AE6B00 Surface #EFEAD6 Anchor #3C2F21

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 #155100 Secondary #754E1C Surface #E6DBC0 Accent #3D513F 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 #155100 Anchor #392B1E Surface #EDE4D0 Accent #889B6C 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 #155100 Surface #F0E8D6 Anchor #61202A Accent #E6C3BA 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 #155100 Secondary #5D7058 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 #155100 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 50/100

Neutral

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

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 63/100

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 49/100

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 33/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 67/100

High

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

Surface fit 23/100

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 #155100

For UI

For branding

For interior

For fashion

People also use #155100 with

Avocado 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 9.5:1. Use

Subtle surface Use #C6F3B5 for cards and hover fills. Tint 80

Avoid beside #005205 — 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 #155100 at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #155100;
  --color-base-rgb: 21 81 0;
  --color-base-oklch: oklch(38.1% 0.122 139.8);
  --color-50: #F4FEF0;
  --color-100: #E2FDD8;
  --color-200: #C5FCB1;
  --color-300: #99F877;
  --color-400: #72EC46;
  --color-500: #51D222;
  --color-600: #449F23;
  --color-700: #35701F;
  --color-800: #254818;
  --color-900: #182C11;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F4FEF0',
    100: '#E2FDD8',
    200: '#C5FCB1',
    300: '#99F877',
    400: '#72EC46',
    500: '#51D222',
    600: '#449F23',
    700: '#35701F',
    800: '#254818',
    900: '#182C11',
  },
}

$base: #155100;
$base-ink: #FFFFFF;
$base-50: #F4FEF0;
$base-100: #E2FDD8;
$base-200: #C5FCB1;
$base-300: #99F877;
$base-400: #72EC46;
$base-500: #51D222;
$base-600: #449F23;
$base-700: #35701F;
$base-800: #254818;
$base-900: #182C11;
$base-hover: #114100;
$base-subtle: #A8F08E;

{
    "color": {
        "base": {
            "value": "#155100",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FEF0",
                "type": "color"
            },
            "100": {
                "value": "#E2FDD8",
                "type": "color"
            },
            "200": {
                "value": "#C5FCB1",
                "type": "color"
            },
            "300": {
                "value": "#99F877",
                "type": "color"
            },
            "400": {
                "value": "#72EC46",
                "type": "color"
            },
            "500": {
                "value": "#51D222",
                "type": "color"
            },
            "600": {
                "value": "#449F23",
                "type": "color"
            },
            "700": {
                "value": "#35701F",
                "type": "color"
            },
            "800": {
                "value": "#254818",
                "type": "color"
            },
            "900": {
                "value": "#182C11",
                "type": "color"
            }
        }
    }
}

Palettes built on #155100

Color Lab

Pairs with #155100

UI roles & guardrails

In real applications

Scales

Every model

Export