What color is #37401B?

#37401B is a dark lime green. In RGB it is rgb(55, 64, 27), and in HSL hsl(75, 41%, 18%).

Is #37401B accessible as text?

On white, #37401B has a contrast ratio of 10.99:1 (passes WCAG AA for body text); on black it is 1.91:1 (fails). For text placed on #37401B, use white for the best readability.

What is the closest Tailwind color to #37401B?

The nearest Tailwind CSS token is olive-700 (#474739).

What colors go well with #37401B?

#37401B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #241B41. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #37401B below.

Is #37401B good for buttons?

#37401B works well for buttons and highlights, but use white text on #37401B — black text only reaches 1.91:1, below the 4.5:1 needed for normal-size labels.

Is #37401B the same as CSS darkslategray?

No — #37401B 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.

#37401B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #37401B

Not just a swatch — here's how #37401B works with other colors. Named schemes with #37401B in its natural role, and a note on why the supporting colors balance it.

Warm Autumn Interior Dominant · 5 colors

Dominant #37401B Secondary #B06A02 Accent #6B7B4A Surface #F2ECDD Anchor #3A2B1E

This palette keeps Espresso as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Vintage Leather Lead · 5 colors

Lead #37401B Secondary #774D1E Surface #E7DBC0 Accent #3E513E Anchor #5B2324

Espresso plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Botanical Studio Lead · 5 colors

Lead #37401B Secondary #506B38 Accent #B06A02 Surface #EFE9D6 Anchor #3D2F21

Espresso leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Desert Clay Center · 5 colors

Center #37401B Surface #DED0A8 Secondary #AC7D4F Accent #8E9A72 Anchor #3D2D1F

Espresso holds the warm center of this desert palette with sand and clay beside it, a muted-sage accent and a dark-brown anchor.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #37401B Secondary #5F6357 Support #999186 Ink #17140F

Espresso 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 Espresso carrying the quiet middle.

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Color Lab

How #37401B 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 56/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 71/100

High

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 23/100

Low

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

UI accent fit 44/100

Moderate

Workable accent with care around contrast.

Surface fit 44/100

Moderate

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 #37401B

For UI

For branding

For interior

For fashion

People also use #37401B with

Army Green British Racing Green Russian Violet 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 11.0:1. Use

Subtle surface Use #DBE2C9 for cards and hover fills. Tint 80

Avoid beside #2B411B — 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 #37401B 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: #37401B;
  --color-base-rgb: 55 64 27;
  --color-base-oklch: oklch(35.4% 0.058 120.8);
  --color-50: #F9FBF4;
  --color-100: #EFF3E2;
  --color-200: #DFE7C6;
  --color-300: #C5D29D;
  --color-400: #AABB77;
  --color-500: #8C9E56;
  --color-600: #6E7A47;
  --color-700: #505837;
  --color-800: #353A27;
  --color-900: #212419;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  espresso: {
    50: '#F9FBF4',
    100: '#EFF3E2',
    200: '#DFE7C6',
    300: '#C5D29D',
    400: '#AABB77',
    500: '#8C9E56',
    600: '#6E7A47',
    700: '#505837',
    800: '#353A27',
    900: '#212419',
  },
}

$base: #37401B;
$base-ink: #FFFFFF;
$base-50: #F9FBF4;
$base-100: #EFF3E2;
$base-200: #DFE7C6;
$base-300: #C5D29D;
$base-400: #AABB77;
$base-500: #8C9E56;
$base-600: #6E7A47;
$base-700: #505837;
$base-800: #353A27;
$base-900: #212419;
$base-hover: #2C3416;
$base-subtle: #CAD4AD;

{
    "color": {
        "base": {
            "value": "#37401B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F9FBF4",
                "type": "color"
            },
            "100": {
                "value": "#EFF3E2",
                "type": "color"
            },
            "200": {
                "value": "#DFE7C6",
                "type": "color"
            },
            "300": {
                "value": "#C5D29D",
                "type": "color"
            },
            "400": {
                "value": "#AABB77",
                "type": "color"
            },
            "500": {
                "value": "#8C9E56",
                "type": "color"
            },
            "600": {
                "value": "#6E7A47",
                "type": "color"
            },
            "700": {
                "value": "#505837",
                "type": "color"
            },
            "800": {
                "value": "#353A27",
                "type": "color"
            },
            "900": {
                "value": "#212419",
                "type": "color"
            }
        }
    }
}

Palettes built on #37401B

Color Lab

Pairs with #37401B

UI roles & guardrails

In real applications

Scales

Every model

Export