What color is #374E58?

#374E58 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(55, 78, 88), and in HSL hsl(198, 23%, 28%).

Is #374E58 accessible as text?

On white, #374E58 has a contrast ratio of 8.78:1 (passes WCAG AA for body text); on black it is 2.39:1 (fails). For text placed on #374E58, use white for the best readability.

What is the closest Tailwind color to #374E58?

The nearest Tailwind CSS token is gray-600 (#4A5565).

What colors go well with #374E58?

As a neutral, #374E58 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #374E58 the same as CSS darkslategray?

No — #374E58 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.

#374E58 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #374E58

Not just a swatch — here's how #374E58 works with other colors. Named schemes with #374E58 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #374E58 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

Dark Slate Gray 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 #374E58 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Dark Slate Gray 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 #374E58 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #5A6F79

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

Vintage Leather Lead · 5 colors

Lead #374E58 Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233D

Dark Slate Gray 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 #F6F4EF Accent #374E58 Secondary #6B7377 Support #969386 Ink #16140F

Dark Slate Gray 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 Dark Slate Gray carrying the quiet middle.

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Color Lab

How #374E58 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 40/100

Neutral

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 59/100

Moderate

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

Brand distinctiveness 13/100

Very low

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

UI accent fit 48/100

Moderate

Workable accent with care around contrast.

Surface fit 48/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #374E58

For UI

For branding

For interior

For fashion

People also use #374E58 with

Myrtle Green Charcoal Taupe 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 8.8:1. Use

Subtle surface Use #D4DDE0 for cards and hover fills. Tint 80

Avoid beside #374358 — 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 #374E58 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: #374E58;
  --color-base-rgb: 55 78 88;
  --color-base-oklch: oklch(40.9% 0.033 226.7);
  --color-50: #F5F8F9;
  --color-100: #E6EDF0;
  --color-200: #CDDAE0;
  --color-300: #A9BEC6;
  --color-400: #86A1AC;
  --color-500: #66828F;
  --color-600: #53676F;
  --color-700: #3E4B51;
  --color-800: #2B3336;
  --color-900: #1B2022;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F5F8F9',
    100: '#E6EDF0',
    200: '#CDDAE0',
    300: '#A9BEC6',
    400: '#86A1AC',
    500: '#66828F',
    600: '#53676F',
    700: '#3E4B51',
    800: '#2B3336',
    900: '#1B2022',
  },
}

$base: #374E58;
$base-ink: #FFFFFF;
$base-50: #F5F8F9;
$base-100: #E6EDF0;
$base-200: #CDDAE0;
$base-300: #A9BEC6;
$base-400: #86A1AC;
$base-500: #66828F;
$base-600: #53676F;
$base-700: #3E4B51;
$base-800: #2B3336;
$base-900: #1B2022;
$base-hover: #2C3E46;
$base-subtle: #BECCD2;

{
    "color": {
        "base": {
            "value": "#374E58",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F8F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EDF0",
                "type": "color"
            },
            "200": {
                "value": "#CDDAE0",
                "type": "color"
            },
            "300": {
                "value": "#A9BEC6",
                "type": "color"
            },
            "400": {
                "value": "#86A1AC",
                "type": "color"
            },
            "500": {
                "value": "#66828F",
                "type": "color"
            },
            "600": {
                "value": "#53676F",
                "type": "color"
            },
            "700": {
                "value": "#3E4B51",
                "type": "color"
            },
            "800": {
                "value": "#2B3336",
                "type": "color"
            },
            "900": {
                "value": "#1B2022",
                "type": "color"
            }
        }
    }
}

Palettes built on #374E58

Color Lab

Pairs with #374E58

UI roles & guardrails

In real applications

Scales

Every model

Export