What color is #2F3731?

#2F3731 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(47, 55, 49), and in HSL hsl(135, 8%, 20%).

Is #2F3731 accessible as text?

On white, #2F3731 has a contrast ratio of 12.27:1 (passes WCAG AA for body text); on black it is 1.71:1 (fails). For text placed on #2F3731, use white for the best readability.

What is the closest Tailwind color to #2F3731?

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

What colors go well with #2F3731?

As a neutral, #2F3731 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 #2F3731 the same as CSS darkslategray?

No — #2F3731 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.

#2F3731 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2F3731

Not just a swatch — here's how #2F3731 works with other colors. Named schemes with #2F3731 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #2F3731 Secondary #4B6C3D Accent #AC6C00 Surface #EEEAD6 Anchor #3C2F20

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 #2F3731 Surface #13161A Highlight #F4F6F8 Secondary #586771 Accent #4F5751

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 #2F3731 Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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 #2F3731 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

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 #2F3731 Secondary #585B59 Support #989286 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.

Build a working theme in the generator →

Color Lab

How #2F3731 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 49/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 26/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 6/100

Very low

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

UI accent fit 26/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 59/100

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 #2F3731

For UI

For branding

For interior

For fashion

People also use #2F3731 with

Outer Space Onyx Gunmetal Gray 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 12.3:1. Use

Subtle surface Use #D4D9D5 for cards and hover fills. Tint 80

Avoid beside #2F3734 — 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 #2F3731 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: #2F3731;
  --color-base-rgb: 47 55 49;
  --color-base-oklch: oklch(32.7% 0.015 153.1);
  --color-50: #F7F8F7;
  --color-100: #E9ECEA;
  --color-200: #D3D9D5;
  --color-300: #B2BDB5;
  --color-400: #92A096;
  --color-500: #738177;
  --color-600: #5C665E;
  --color-700: #444B46;
  --color-800: #2F322F;
  --color-900: #1D201E;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F7F8F7',
    100: '#E9ECEA',
    200: '#D3D9D5',
    300: '#B2BDB5',
    400: '#92A096',
    500: '#738177',
    600: '#5C665E',
    700: '#444B46',
    800: '#2F322F',
    900: '#1D201E',
  },
}

$base: #2F3731;
$base-ink: #FFFFFF;
$base-50: #F7F8F7;
$base-100: #E9ECEA;
$base-200: #D3D9D5;
$base-300: #B2BDB5;
$base-400: #92A096;
$base-500: #738177;
$base-600: #5C665E;
$base-700: #444B46;
$base-800: #2F322F;
$base-900: #1D201E;
$base-hover: #262C27;
$base-subtle: #BEC6C0;

{
    "color": {
        "base": {
            "value": "#2F3731",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F7",
                "type": "color"
            },
            "100": {
                "value": "#E9ECEA",
                "type": "color"
            },
            "200": {
                "value": "#D3D9D5",
                "type": "color"
            },
            "300": {
                "value": "#B2BDB5",
                "type": "color"
            },
            "400": {
                "value": "#92A096",
                "type": "color"
            },
            "500": {
                "value": "#738177",
                "type": "color"
            },
            "600": {
                "value": "#5C665E",
                "type": "color"
            },
            "700": {
                "value": "#444B46",
                "type": "color"
            },
            "800": {
                "value": "#2F322F",
                "type": "color"
            },
            "900": {
                "value": "#1D201E",
                "type": "color"
            }
        }
    }
}