What color is #1F4E21?

#1F4E21 is a dark green. In RGB it is rgb(31, 78, 33), and in HSL hsl(123, 43%, 21%).

Is #1F4E21 accessible as text?

On white, #1F4E21 has a contrast ratio of 9.68:1 (passes WCAG AA for body text); on black it is 2.17:1 (fails). For text placed on #1F4E21, use white for the best readability.

What is the closest Tailwind color to #1F4E21?

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

What colors go well with #1F4E21?

#1F4E21 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4D1F4A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1F4E21 below.

Is #1F4E21 good for buttons?

#1F4E21 works well for buttons and highlights, but use white text on #1F4E21 — black text only reaches 2.17:1, below the 4.5:1 needed for normal-size labels.

Is #1F4E21 the same as CSS darkslategray?

No — #1F4E21 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#1F4E21 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1F4E21

Not just a swatch — here's how #1F4E21 works with other colors. Named schemes with #1F4E21 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #1F4E21 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 #1F4E21 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.

Japanese Sand Base · 5 colors

Base #1F4E21 Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Castleton Green sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Luxury Packaging Feature · 5 colors

Feature #1F4E21 Anchor #141210 Accent #C0A64B Secondary #232C23 Surface #F1EDE3

Castleton Green carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #1F4E21 Secondary #5E6E5E 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 #1F4E21 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 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 58/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 66/100

High

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

Brand distinctiveness 35/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 61/100

High

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

Surface fit 33/100

Low

Usable as a tinted surface in measured doses.

Print safety 80/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1F4E21

For UI

For branding

For interior

For fashion

People also use #1F4E21 with

Dark Olive 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 9.7:1. Use

Subtle surface Use #CAE3CB for cards and hover fills. Tint 80

Avoid beside #1F4D30 — 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 #1F4E21 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: #1F4E21;
  --color-base-rgb: 31 78 33;
  --color-base-oklch: oklch(37.9% 0.089 144.3);
  --color-50: #F4FBF4;
  --color-100: #E1F4E2;
  --color-200: #C5E8C6;
  --color-300: #9CD39F;
  --color-400: #75BD79;
  --color-500: #55A058;
  --color-600: #467C49;
  --color-700: #365938;
  --color-800: #263B27;
  --color-900: #192419;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F4FBF4',
    100: '#E1F4E2',
    200: '#C5E8C6',
    300: '#9CD39F',
    400: '#75BD79',
    500: '#55A058',
    600: '#467C49',
    700: '#365938',
    800: '#263B27',
    900: '#192419',
  },
}

$base: #1F4E21;
$base-ink: #FFFFFF;
$base-50: #F4FBF4;
$base-100: #E1F4E2;
$base-200: #C5E8C6;
$base-300: #9CD39F;
$base-400: #75BD79;
$base-500: #55A058;
$base-600: #467C49;
$base-700: #365938;
$base-800: #263B27;
$base-900: #192419;
$base-hover: #183D1A;
$base-subtle: #AFD6B1;

{
    "color": {
        "base": {
            "value": "#1F4E21",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FBF4",
                "type": "color"
            },
            "100": {
                "value": "#E1F4E2",
                "type": "color"
            },
            "200": {
                "value": "#C5E8C6",
                "type": "color"
            },
            "300": {
                "value": "#9CD39F",
                "type": "color"
            },
            "400": {
                "value": "#75BD79",
                "type": "color"
            },
            "500": {
                "value": "#55A058",
                "type": "color"
            },
            "600": {
                "value": "#467C49",
                "type": "color"
            },
            "700": {
                "value": "#365938",
                "type": "color"
            },
            "800": {
                "value": "#263B27",
                "type": "color"
            },
            "900": {
                "value": "#192419",
                "type": "color"
            }
        }
    }
}

Palettes built on #1F4E21

Color Lab

Pairs with #1F4E21

UI roles & guardrails

In real applications

Scales

Every model

Export