What color is #3A3E37?

#3A3E37 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(58, 62, 55), and in HSL hsl(94, 6%, 23%).

Is #3A3E37 accessible as text?

On white, #3A3E37 has a contrast ratio of 10.91:1 (passes WCAG AA for body text); on black it is 1.92:1 (fails). For text placed on #3A3E37, use white for the best readability.

What is the closest Tailwind color to #3A3E37?

The nearest Tailwind CSS token is neutral-700 (#404040).

What colors go well with #3A3E37?

As a neutral, #3A3E37 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 #3A3E37 the same as CSS darkslategray?

No — #3A3E37 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.

#3A3E37 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3A3E37

Not just a swatch — here's how #3A3E37 works with other colors. Named schemes with #3A3E37 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #3A3E37 Secondary #4E6B3A Accent #AF6A00 Surface #EFE9D6 Anchor #3D2F21

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

Tech Product Signal · 5 colors

Signal #3A3E37 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #5B5E58

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

Vintage Leather Lead · 5 colors

Lead #3A3E37 Secondary #764D1D Surface #E6DBC0 Accent #3D513F Anchor #5B2323

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

Japanese Sand Base · 5 colors

Base #3A3E37 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Onyx sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #3A3E37 Secondary #626360 Support #999286 Ink #17140F

Onyx 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 Onyx carrying the quiet middle.

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Color Lab

How #3A3E37 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 51/100

Neutral

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

Moderate

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

Naturalness 30/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 62/100

High

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

Brand distinctiveness 5/100

Very low

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

UI accent fit 31/100

Low

Workable accent with care around contrast.

Surface fit 58/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3A3E37

For UI

For branding

For interior

For fashion

People also use #3A3E37 with

Iron Gray Onyx Platinum Outer Space

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 10.9:1. Use

Subtle surface Use #D8D9D6 for cards and hover fills. Tint 80

Avoid beside #383E37 — 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 #3A3E37 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: #3A3E37;
  --color-base-rgb: 58 62 55;
  --color-base-oklch: oklch(35.8% 0.013 131.6);
  --color-50: #F7F8F7;
  --color-100: #EAECE9;
  --color-200: #D6D9D4;
  --color-300: #B7BBB4;
  --color-400: #989E94;
  --color-500: #7A8075;
  --color-600: #60655D;
  --color-700: #474A45;
  --color-800: #30322F;
  --color-900: #1E201D;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F7F8F7',
    100: '#EAECE9',
    200: '#D6D9D4',
    300: '#B7BBB4',
    400: '#989E94',
    500: '#7A8075',
    600: '#60655D',
    700: '#474A45',
    800: '#30322F',
    900: '#1E201D',
  },
}

$base: #3A3E37;
$base-ink: #FFFFFF;
$base-50: #F7F8F7;
$base-100: #EAECE9;
$base-200: #D6D9D4;
$base-300: #B7BBB4;
$base-400: #989E94;
$base-500: #7A8075;
$base-600: #60655D;
$base-700: #474A45;
$base-800: #30322F;
$base-900: #1E201D;
$base-hover: #2F322C;
$base-subtle: #C4C7C1;

{
    "color": {
        "base": {
            "value": "#3A3E37",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F7",
                "type": "color"
            },
            "100": {
                "value": "#EAECE9",
                "type": "color"
            },
            "200": {
                "value": "#D6D9D4",
                "type": "color"
            },
            "300": {
                "value": "#B7BBB4",
                "type": "color"
            },
            "400": {
                "value": "#989E94",
                "type": "color"
            },
            "500": {
                "value": "#7A8075",
                "type": "color"
            },
            "600": {
                "value": "#60655D",
                "type": "color"
            },
            "700": {
                "value": "#474A45",
                "type": "color"
            },
            "800": {
                "value": "#30322F",
                "type": "color"
            },
            "900": {
                "value": "#1E201D",
                "type": "color"
            }
        }
    }
}