What color is #3F3837?

#3F3837 is a dark low-chroma warm gray with a subtle warm cast. In RGB it is rgb(63, 56, 55), and in HSL hsl(7, 7%, 23%).

Is #3F3837 accessible as text?

On white, #3F3837 has a contrast ratio of 11.46:1 (passes WCAG AA for body text); on black it is 1.83:1 (fails). For text placed on #3F3837, use white for the best readability.

What is the closest Tailwind color to #3F3837?

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

What colors go well with #3F3837?

As a neutral, #3F3837 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 #3F3837 the same as CSS darkslategray?

No — #3F3837 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.

#3F3837 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F3837

Not just a swatch — here's how #3F3837 works with other colors. Named schemes with #3F3837 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F3837 Surface #15161A Highlight #F4F6F8 Secondary #5E6473 Accent #5F5857

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 #3F3837 Secondary #7B4927 Surface #EAD9C0 Accent #43503A Anchor #5A222E

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 #3F3837 Surface #F0E9DC Highlight #F7F1E7 Secondary #BBAEA0 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.

Luxury Packaging Feature · 5 colors

Feature #3F3837 Anchor #141210 Accent #D09E4E Secondary #322523 Surface #F3EDE3

Onyx 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 #F7F4EF Accent #3F3837 Secondary #625F5F Support #9B9186 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 #3F3837 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 53/100

Neutral

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

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

Naturalness 23/100

Low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

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 4/100

Very low

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

UI accent fit 28/100

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 99/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F3837

For UI

For branding

For interior

For fashion

People also use #3F3837 with

Iron Gray Taupe Onyx 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 11.5:1. Use

Subtle surface Use #DAD6D6 for cards and hover fills. Tint 80

Avoid beside #3F3A37 — 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 #3F3837 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3F3837;
  --color-base-rgb: 63 56 55;
  --color-base-oklch: oklch(34.8% 0.010 27.4);
  --color-50: #F8F7F7;
  --color-100: #ECE9E9;
  --color-200: #D9D4D3;
  --color-300: #BCB4B3;
  --color-400: #9F9593;
  --color-500: #817674;
  --color-600: #655E5D;
  --color-700: #4A4545;
  --color-800: #322F2F;
  --color-900: #201E1D;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F8F7F7',
    100: '#ECE9E9',
    200: '#D9D4D3',
    300: '#BCB4B3',
    400: '#9F9593',
    500: '#817674',
    600: '#655E5D',
    700: '#4A4545',
    800: '#322F2F',
    900: '#201E1D',
  },
}

$base: #3F3837;
$base-ink: #FFFFFF;
$base-50: #F8F7F7;
$base-100: #ECE9E9;
$base-200: #D9D4D3;
$base-300: #BCB4B3;
$base-400: #9F9593;
$base-500: #817674;
$base-600: #655E5D;
$base-700: #4A4545;
$base-800: #322F2F;
$base-900: #201E1D;
$base-hover: #322C2C;
$base-subtle: #C7C2C1;

{
    "color": {
        "base": {
            "value": "#3F3837",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F7F7",
                "type": "color"
            },
            "100": {
                "value": "#ECE9E9",
                "type": "color"
            },
            "200": {
                "value": "#D9D4D3",
                "type": "color"
            },
            "300": {
                "value": "#BCB4B3",
                "type": "color"
            },
            "400": {
                "value": "#9F9593",
                "type": "color"
            },
            "500": {
                "value": "#817674",
                "type": "color"
            },
            "600": {
                "value": "#655E5D",
                "type": "color"
            },
            "700": {
                "value": "#4A4545",
                "type": "color"
            },
            "800": {
                "value": "#322F2F",
                "type": "color"
            },
            "900": {
                "value": "#201E1D",
                "type": "color"
            }
        }
    }
}