What color is #185B4E?

#185B4E is a dark teal. In RGB it is rgb(24, 91, 78), and in HSL hsl(168, 58%, 23%).

Is #185B4E accessible as text?

On white, #185B4E has a contrast ratio of 7.94:1 (passes WCAG AA for body text); on black it is 2.65:1 (fails). For text placed on #185B4E, use white for the best readability.

What is the closest Tailwind color to #185B4E?

The nearest Tailwind CSS token is teal-800 (#005F5A).

What colors go well with #185B4E?

#185B4E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5D1926. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #185B4E below.

Is #185B4E good for buttons?

#185B4E works well for buttons and highlights, but use white text on #185B4E — black text only reaches 2.65:1, below the 4.5:1 needed for normal-size labels.

Is #185B4E the same as CSS darkslategray?

No — #185B4E 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.

#185B4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #185B4E

Not just a swatch — here's how #185B4E works with other colors. Named schemes with #185B4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #185B4E Accent #A7C4BC Surface #E0D9BE Secondary #9AA0A0 Anchor #1B3549

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

Nordic Calm Accent · 5 colors

Accent #185B4E Secondary #AEB4B7 Surface #F1F2F0 Support #7994A4 Anchor #2D3236

Castleton Green keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #185B4E Secondary #734F19 Surface #E4DCC0 Accent #3B5141 Anchor #5B231E

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 #185B4E Anchor #382B1E Surface #ECE4D0 Accent #839C70 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #185B4E Secondary #687B76 Support #979286 Ink #16140F

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 #185B4E 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 38/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 34/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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

Brand distinctiveness 19/100

Very low

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

UI accent fit 67/100

High

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

Surface fit 36/100

Low

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #185B4E

For UI

For branding

For interior

For fashion

People also use #185B4E with

Green Charcoal Rosewood Platinum Dark Slate Gray

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 7.9:1. Use

Subtle surface Use #C7E8E2 for cards and hover fills. Tint 80

Avoid beside #19545D — 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 #185B4E 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: #185B4E;
  --color-base-rgb: 24 91 78;
  --color-base-oklch: oklch(42.6% 0.069 177.0);
  --color-50: #F2FCFA;
  --color-100: #DEF7F2;
  --color-200: #BFEEE4;
  --color-300: #92DDCE;
  --color-400: #69C9B6;
  --color-500: #47AD99;
  --color-600: #3D8577;
  --color-700: #305F55;
  --color-800: #233E39;
  --color-900: #172623;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F2FCFA',
    100: '#DEF7F2',
    200: '#BFEEE4',
    300: '#92DDCE',
    400: '#69C9B6',
    500: '#47AD99',
    600: '#3D8577',
    700: '#305F55',
    800: '#233E39',
    900: '#172623',
  },
}

$base: #185B4E;
$base-ink: #FFFFFF;
$base-50: #F2FCFA;
$base-100: #DEF7F2;
$base-200: #BFEEE4;
$base-300: #92DDCE;
$base-400: #69C9B6;
$base-500: #47AD99;
$base-600: #3D8577;
$base-700: #305F55;
$base-800: #233E39;
$base-900: #172623;
$base-hover: #144A3F;
$base-subtle: #AADED4;

{
    "color": {
        "base": {
            "value": "#185B4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCFA",
                "type": "color"
            },
            "100": {
                "value": "#DEF7F2",
                "type": "color"
            },
            "200": {
                "value": "#BFEEE4",
                "type": "color"
            },
            "300": {
                "value": "#92DDCE",
                "type": "color"
            },
            "400": {
                "value": "#69C9B6",
                "type": "color"
            },
            "500": {
                "value": "#47AD99",
                "type": "color"
            },
            "600": {
                "value": "#3D8577",
                "type": "color"
            },
            "700": {
                "value": "#305F55",
                "type": "color"
            },
            "800": {
                "value": "#233E39",
                "type": "color"
            },
            "900": {
                "value": "#172623",
                "type": "color"
            }
        }
    }
}