What color is #373658?

#373658 is a dark, muted blue-violet. In RGB it is rgb(55, 54, 88), and in HSL hsl(242, 24%, 28%).

Is #373658 accessible as text?

On white, #373658 has a contrast ratio of 11.47:1 (passes WCAG AA for body text); on black it is 1.83:1 (fails). For text placed on #373658, use white for the best readability.

What is the closest Tailwind color to #373658?

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

What colors go well with #373658?

#373658 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #575936. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #373658 below.

Is #373658 good for buttons?

#373658 works well for buttons and highlights, but use white text on #373658 — black text only reaches 1.83:1, below the 4.5:1 needed for normal-size labels.

Is #373658 the same as CSS darkslategray?

No — #373658 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#373658 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #373658

Not just a swatch — here's how #373658 works with other colors. Named schemes with #373658 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #373658 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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 #373658 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.

Vintage Leather Lead · 5 colors

Lead #373658 Secondary #7E4533 Surface #EDD7C2 Accent #365247 Anchor #582238

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.

Luxury Packaging Feature · 5 colors

Feature #373658 Anchor #141210 Accent #DB9757 Secondary #272833 Surface #F3ECE3

Charcoal carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #373658 Secondary #5F5F6C Support #9D9088 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 #373658 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 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 40/100

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 43/100

Moderate

Workable accent with care around contrast.

Surface fit 44/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #373658

For UI

For branding

For interior

For fashion

People also use #373658 with

Iron Gray Eggplant Ebony Gainsboro Gunmetal 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 11.5:1. Use

Subtle surface Use #D4D4E1 for cards and hover fills. Tint 80

Avoid beside #433659 — 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 #373658 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: #373658;
  --color-base-rgb: 55 54 88;
  --color-base-oklch: oklch(35.0% 0.059 284.3);
  --color-50: #F5F5F9;
  --color-100: #E6E5F0;
  --color-200: #CDCCE0;
  --color-300: #A9A8C7;
  --color-400: #8685AD;
  --color-500: #676590;
  --color-600: #535270;
  --color-700: #3E3E51;
  --color-800: #2B2B36;
  --color-900: #1C1B22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F5F9',
    100: '#E6E5F0',
    200: '#CDCCE0',
    300: '#A9A8C7',
    400: '#8685AD',
    500: '#676590',
    600: '#535270',
    700: '#3E3E51',
    800: '#2B2B36',
    900: '#1C1B22',
  },
}

$base: #373658;
$base-ink: #FFFFFF;
$base-50: #F5F5F9;
$base-100: #E6E5F0;
$base-200: #CDCCE0;
$base-300: #A9A8C7;
$base-400: #8685AD;
$base-500: #676590;
$base-600: #535270;
$base-700: #3E3E51;
$base-800: #2B2B36;
$base-900: #1C1B22;
$base-hover: #2C2B47;
$base-subtle: #BFBED2;

{
    "color": {
        "base": {
            "value": "#373658",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F5F9",
                "type": "color"
            },
            "100": {
                "value": "#E6E5F0",
                "type": "color"
            },
            "200": {
                "value": "#CDCCE0",
                "type": "color"
            },
            "300": {
                "value": "#A9A8C7",
                "type": "color"
            },
            "400": {
                "value": "#8685AD",
                "type": "color"
            },
            "500": {
                "value": "#676590",
                "type": "color"
            },
            "600": {
                "value": "#535270",
                "type": "color"
            },
            "700": {
                "value": "#3E3E51",
                "type": "color"
            },
            "800": {
                "value": "#2B2B36",
                "type": "color"
            },
            "900": {
                "value": "#1C1B22",
                "type": "color"
            }
        }
    }
}

Palettes built on #373658

Color Lab

Pairs with #373658

UI roles & guardrails

In real applications

Scales

Every model

Export