What color is #373E56?

#373E56 is a dark, muted blue. In RGB it is rgb(55, 62, 86), and in HSL hsl(226, 22%, 28%).

Is #373E56 accessible as text?

On white, #373E56 has a contrast ratio of 10.57:1 (passes WCAG AA for body text); on black it is 1.99:1 (fails). For text placed on #373E56, use white for the best readability.

What is the closest Tailwind color to #373E56?

The nearest Tailwind CSS token is mauve-700 (#463947).

What colors go well with #373E56?

#373E56 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #575038. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #373E56 below.

Is #373E56 good for buttons?

#373E56 works well for buttons and highlights, but use white text on #373E56 — black text only reaches 1.99:1, below the 4.5:1 needed for normal-size labels.

Is #373E56 the same as CSS darkslategray?

No — #373E56 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#373E56 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #373E56

Not just a swatch — here's how #373E56 works with other colors. Named schemes with #373E56 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #373E56 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Charcoal 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 #373E56 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

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

Tech Product Signal · 5 colors

Signal #373E56 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #585F76

Charcoal is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Charcoal.

Vintage Leather Lead · 5 colors

Lead #373E56 Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #373E56 Secondary #62656E Support #9D8F88 Ink #18140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #373E56 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 41/100

Neutral

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 43/100

Moderate

Workable accent with care around contrast.

Surface fit 48/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #373E56

For UI

For branding

For interior

For fashion

People also use #373E56 with

Teal Blue Charcoal Umber Gainsboro

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 10.6:1. Use

Subtle surface Use #D4D7E0 for cards and hover fills. Tint 80

Avoid beside #3B3857 — 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 #373E56 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: #373E56;
  --color-base-rgb: 55 62 86;
  --color-base-oklch: oklch(36.8% 0.043 271.6);
  --color-50: #F6F6F9;
  --color-100: #E6E8EF;
  --color-200: #CDD1DF;
  --color-300: #A9B0C6;
  --color-400: #878FAB;
  --color-500: #67708E;
  --color-600: #535A6F;
  --color-700: #3F4350;
  --color-800: #2B2E36;
  --color-900: #1C1D22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F6F6F9',
    100: '#E6E8EF',
    200: '#CDD1DF',
    300: '#A9B0C6',
    400: '#878FAB',
    500: '#67708E',
    600: '#535A6F',
    700: '#3F4350',
    800: '#2B2E36',
    900: '#1C1D22',
  },
}

$base: #373E56;
$base-ink: #FFFFFF;
$base-50: #F6F6F9;
$base-100: #E6E8EF;
$base-200: #CDD1DF;
$base-300: #A9B0C6;
$base-400: #878FAB;
$base-500: #67708E;
$base-600: #535A6F;
$base-700: #3F4350;
$base-800: #2B2E36;
$base-900: #1C1D22;
$base-hover: #2D3246;
$base-subtle: #BFC3D1;

{
    "color": {
        "base": {
            "value": "#373E56",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F6F9",
                "type": "color"
            },
            "100": {
                "value": "#E6E8EF",
                "type": "color"
            },
            "200": {
                "value": "#CDD1DF",
                "type": "color"
            },
            "300": {
                "value": "#A9B0C6",
                "type": "color"
            },
            "400": {
                "value": "#878FAB",
                "type": "color"
            },
            "500": {
                "value": "#67708E",
                "type": "color"
            },
            "600": {
                "value": "#535A6F",
                "type": "color"
            },
            "700": {
                "value": "#3F4350",
                "type": "color"
            },
            "800": {
                "value": "#2B2E36",
                "type": "color"
            },
            "900": {
                "value": "#1C1D22",
                "type": "color"
            }
        }
    }
}