What color is #184C23?

#184C23 is a dark green. In RGB it is rgb(24, 76, 35), and in HSL hsl(133, 52%, 20%).

Is #184C23 accessible as text?

On white, #184C23 has a contrast ratio of 10.01:1 (passes WCAG AA for body text); on black it is 2.10:1 (fails). For text placed on #184C23, use white for the best readability.

What is the closest Tailwind color to #184C23?

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

What colors go well with #184C23?

#184C23 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4E1842. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #184C23 below.

Is #184C23 good for buttons?

#184C23 works well for buttons and highlights, but use white text on #184C23 — black text only reaches 2.10:1, below the 4.5:1 needed for normal-size labels.

Is #184C23 the same as CSS darkslategray?

No — #184C23 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.

#184C23 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #184C23

Not just a swatch — here's how #184C23 works with other colors. Named schemes with #184C23 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #184C23 Secondary #4C6B3C Accent #AD6C00 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 #184C23 Secondary #754E1B Surface #E5DBC0 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 #184C23 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 #184C23 Anchor #141210 Accent #C0A64B Secondary #222C23 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 #184C23 Secondary #5B6B5C 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 #184C23 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 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 56/100

Moderate

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

Luxury 67/100

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 58/100

Moderate

Workable accent with care around contrast.

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #184C23

For UI

For branding

For interior

For fashion

People also use #184C23 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 10.0:1. Use

Subtle surface Use #C7E5CE for cards and hover fills. Tint 80

Avoid beside #184E36 — 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 #184C23 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: #184C23;
  --color-base-rgb: 24 76 35;
  --color-base-oklch: oklch(37.1% 0.088 147.7);
  --color-50: #F3FCF5;
  --color-100: #DFF6E4;
  --color-200: #C1EBCA;
  --color-300: #96D9A5;
  --color-400: #6EC481;
  --color-500: #4DA860;
  --color-600: #41814F;
  --color-700: #325C3C;
  --color-800: #243D29;
  --color-900: #18261B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F3FCF5',
    100: '#DFF6E4',
    200: '#C1EBCA',
    300: '#96D9A5',
    400: '#6EC481',
    500: '#4DA860',
    600: '#41814F',
    700: '#325C3C',
    800: '#243D29',
    900: '#18261B',
  },
}

$base: #184C23;
$base-ink: #FFFFFF;
$base-50: #F3FCF5;
$base-100: #DFF6E4;
$base-200: #C1EBCA;
$base-300: #96D9A5;
$base-400: #6EC481;
$base-500: #4DA860;
$base-600: #41814F;
$base-700: #325C3C;
$base-800: #243D29;
$base-900: #18261B;
$base-hover: #143E1D;
$base-subtle: #AADAB4;

{
    "color": {
        "base": {
            "value": "#184C23",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FCF5",
                "type": "color"
            },
            "100": {
                "value": "#DFF6E4",
                "type": "color"
            },
            "200": {
                "value": "#C1EBCA",
                "type": "color"
            },
            "300": {
                "value": "#96D9A5",
                "type": "color"
            },
            "400": {
                "value": "#6EC481",
                "type": "color"
            },
            "500": {
                "value": "#4DA860",
                "type": "color"
            },
            "600": {
                "value": "#41814F",
                "type": "color"
            },
            "700": {
                "value": "#325C3C",
                "type": "color"
            },
            "800": {
                "value": "#243D29",
                "type": "color"
            },
            "900": {
                "value": "#18261B",
                "type": "color"
            }
        }
    }
}