What color is #3F4750?

#3F4750 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(63, 71, 80), and in HSL hsl(212, 12%, 28%).

Is #3F4750 accessible as text?

On white, #3F4750 has a contrast ratio of 9.42:1 (passes WCAG AA for body text); on black it is 2.23:1 (fails). For text placed on #3F4750, use white for the best readability.

What is the closest Tailwind color to #3F4750?

The nearest Tailwind CSS token is zinc-700 (#3F3F46).

What colors go well with #3F4750?

As a neutral, #3F4750 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 #3F4750 the same as CSS darkslategray?

No — #3F4750 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.

#3F4750 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F4750

Not just a swatch — here's how #3F4750 works with other colors. Named schemes with #3F4750 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F4750 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #606871

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

Vintage Leather Lead · 5 colors

Lead #3F4750 Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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

Modern Café Dominant · 5 colors

Dominant #3F4750 Anchor #3B2924 Surface #EAE5D0 Accent #799E78 Secondary #393933

Outer Space anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Japanese Sand Base · 5 colors

Base #3F4750 Surface #ECEADC Highlight #F4F2E7 Secondary #B2B2A0 Ink #2C2724

Outer Space 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 #F6F4EF Accent #3F4750 Secondary #6A6D71 Support #959386 Ink #16140F

Outer Space 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 Outer Space carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3F4750 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 45/100

Neutral

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 57/100

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 29/100

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 7/100

Very low

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

UI accent fit 40/100

Low

Workable accent with care around contrast.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F4750

For UI

For branding

For interior

For fashion

People also use #3F4750 with

Dim Gray Charcoal Outer Space 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 9.4:1. Use

Subtle surface Use #D7DADD for cards and hover fills. Tint 80

Avoid beside #3F4150 — 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 #3F4750 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: #3F4750;
  --color-base-rgb: 63 71 80;
  --color-base-oklch: oklch(39.4% 0.019 251.4);
  --color-50: #F6F7F8;
  --color-100: #E8EAED;
  --color-200: #D1D6DB;
  --color-300: #B0B7BF;
  --color-400: #8F98A3;
  --color-500: #707A85;
  --color-600: #596068;
  --color-700: #43474C;
  --color-800: #2E3033;
  --color-900: #1D1E20;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F6F7F8',
    100: '#E8EAED',
    200: '#D1D6DB',
    300: '#B0B7BF',
    400: '#8F98A3',
    500: '#707A85',
    600: '#596068',
    700: '#43474C',
    800: '#2E3033',
    900: '#1D1E20',
  },
}

$base: #3F4750;
$base-ink: #FFFFFF;
$base-50: #F6F7F8;
$base-100: #E8EAED;
$base-200: #D1D6DB;
$base-300: #B0B7BF;
$base-400: #8F98A3;
$base-500: #707A85;
$base-600: #596068;
$base-700: #43474C;
$base-800: #2E3033;
$base-900: #1D1E20;
$base-hover: #323940;
$base-subtle: #C3C8CD;

{
    "color": {
        "base": {
            "value": "#3F4750",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F8",
                "type": "color"
            },
            "100": {
                "value": "#E8EAED",
                "type": "color"
            },
            "200": {
                "value": "#D1D6DB",
                "type": "color"
            },
            "300": {
                "value": "#B0B7BF",
                "type": "color"
            },
            "400": {
                "value": "#8F98A3",
                "type": "color"
            },
            "500": {
                "value": "#707A85",
                "type": "color"
            },
            "600": {
                "value": "#596068",
                "type": "color"
            },
            "700": {
                "value": "#43474C",
                "type": "color"
            },
            "800": {
                "value": "#2E3033",
                "type": "color"
            },
            "900": {
                "value": "#1D1E20",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F4750

Color Lab

Pairs with #3F4750

UI roles & guardrails

In real applications

Scales

Every model

Export