What color is #255644?

#255644 is a dark teal-green. In RGB it is rgb(37, 86, 68), and in HSL hsl(158, 40%, 24%).

Is #255644 accessible as text?

On white, #255644 has a contrast ratio of 8.42:1 (passes WCAG AA for body text); on black it is 2.49:1 (fails). For text placed on #255644, use white for the best readability.

What is the closest Tailwind color to #255644?

The nearest Tailwind CSS token is teal-900 (#0B4F4A).

What colors go well with #255644?

#255644 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #562537. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #255644 below.

Is #255644 good for buttons?

#255644 works well for buttons and highlights, but use white text on #255644 — black text only reaches 2.49:1, below the 4.5:1 needed for normal-size labels.

Is #255644 the same as CSS darkslategray?

No — #255644 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.

#255644 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #255644

Not just a swatch — here's how #255644 works with other colors. Named schemes with #255644 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #255644 Accent #A7C4BB Surface #E1D9BE 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 #255644 Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 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 #255644 Secondary #744F1A Surface #E5DBC0 Accent #3B5141 Anchor #5B2320

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 #255644 Anchor #382B1E Surface #ECE4D0 Accent #849C6F 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 #255644 Secondary #677770 Support #989286 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.

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Color Lab

How #255644 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 42/100

Neutral

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 57/100

Moderate

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

Naturalness 48/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 48/100

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 24/100

Low

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

UI accent fit 61/100

High

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

Surface fit 39/100

Low

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #255644

For UI

For branding

For interior

For fashion

People also use #255644 with

Dark Olive Green Dark Slate Gray Tyrian Purple Platinum

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 8.4:1. Use

Subtle surface Use #CDE3DB for cards and hover fills. Tint 80

Avoid beside #255654 — 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 #255644 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: #255644;
  --color-base-rgb: 37 86 68;
  --color-base-oklch: oklch(41.3% 0.062 166.8);
  --color-50: #F4FBF8;
  --color-100: #E2F3ED;
  --color-200: #C6E6DB;
  --color-300: #9ED1BE;
  --color-400: #78BAA2;
  --color-500: #579E84;
  --color-600: #487A68;
  --color-700: #37584C;
  --color-800: #273A33;
  --color-900: #192420;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F4FBF8',
    100: '#E2F3ED',
    200: '#C6E6DB',
    300: '#9ED1BE',
    400: '#78BAA2',
    500: '#579E84',
    600: '#487A68',
    700: '#37584C',
    800: '#273A33',
    900: '#192420',
  },
}

$base: #255644;
$base-ink: #FFFFFF;
$base-50: #F4FBF8;
$base-100: #E2F3ED;
$base-200: #C6E6DB;
$base-300: #9ED1BE;
$base-400: #78BAA2;
$base-500: #579E84;
$base-600: #487A68;
$base-700: #37584C;
$base-800: #273A33;
$base-900: #192420;
$base-hover: #1D4536;
$base-subtle: #B3D7CA;

{
    "color": {
        "base": {
            "value": "#255644",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FBF8",
                "type": "color"
            },
            "100": {
                "value": "#E2F3ED",
                "type": "color"
            },
            "200": {
                "value": "#C6E6DB",
                "type": "color"
            },
            "300": {
                "value": "#9ED1BE",
                "type": "color"
            },
            "400": {
                "value": "#78BAA2",
                "type": "color"
            },
            "500": {
                "value": "#579E84",
                "type": "color"
            },
            "600": {
                "value": "#487A68",
                "type": "color"
            },
            "700": {
                "value": "#37584C",
                "type": "color"
            },
            "800": {
                "value": "#273A33",
                "type": "color"
            },
            "900": {
                "value": "#192420",
                "type": "color"
            }
        }
    }
}

Palettes built on #255644

Color Lab

Pairs with #255644

UI roles & guardrails

In real applications

Scales

Every model

Export