What color is #313B38?

#313B38 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(49, 59, 56), and in HSL hsl(162, 9%, 21%).

Is #313B38 accessible as text?

On white, #313B38 has a contrast ratio of 11.58:1 (passes WCAG AA for body text); on black it is 1.81:1 (fails). For text placed on #313B38, use white for the best readability.

What is the closest Tailwind color to #313B38?

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

What colors go well with #313B38?

As a neutral, #313B38 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 #313B38 the same as CSS darkslategray?

No — #313B38 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.

#313B38 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313B38

Not just a swatch — here's how #313B38 works with other colors. Named schemes with #313B38 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #313B38 Surface #14161A Highlight #F4F6F8 Secondary #586771 Accent #515B58

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 #313B38 Secondary #734F19 Surface #E4DCC0 Accent #3B5141 Anchor #5B231F

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 #313B38 Surface #EDEADC Highlight #F5F1E7 Secondary #B5B19F 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.

Luxury Packaging Feature · 5 colors

Feature #313B38 Anchor #141210 Accent #BCA84C Secondary #1E2C28 Surface #F1EDE3

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 #313B38 Secondary #5B5F5E Support #989286 Ink #16140F

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 #313B38 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 48/100

Neutral

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

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

Naturalness 13/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

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 28/100

Low

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

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 #313B38

For UI

For branding

For interior

For fashion

People also use #313B38 with

Outer Space Onyx 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 11.6:1. Use

Subtle surface Use #D4D9D8 for cards and hover fills. Tint 80

Avoid beside #313A3A — 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 #313B38 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: #313B38;
  --color-base-rgb: 49 59 56;
  --color-base-oklch: oklch(34.2% 0.014 175.4);
  --color-50: #F7F8F8;
  --color-100: #E9EDEB;
  --color-200: #D3DAD8;
  --color-300: #B2BDBA;
  --color-400: #92A09C;
  --color-500: #72827E;
  --color-600: #5B6763;
  --color-700: #444B49;
  --color-800: #2E3331;
  --color-900: #1D201F;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F7F8F8',
    100: '#E9EDEB',
    200: '#D3DAD8',
    300: '#B2BDBA',
    400: '#92A09C',
    500: '#72827E',
    600: '#5B6763',
    700: '#444B49',
    800: '#2E3331',
    900: '#1D201F',
  },
}

$base: #313B38;
$base-ink: #FFFFFF;
$base-50: #F7F8F8;
$base-100: #E9EDEB;
$base-200: #D3DAD8;
$base-300: #B2BDBA;
$base-400: #92A09C;
$base-500: #72827E;
$base-600: #5B6763;
$base-700: #444B49;
$base-800: #2E3331;
$base-900: #1D201F;
$base-hover: #272F2C;
$base-subtle: #BEC7C4;

{
    "color": {
        "base": {
            "value": "#313B38",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F8",
                "type": "color"
            },
            "100": {
                "value": "#E9EDEB",
                "type": "color"
            },
            "200": {
                "value": "#D3DAD8",
                "type": "color"
            },
            "300": {
                "value": "#B2BDBA",
                "type": "color"
            },
            "400": {
                "value": "#92A09C",
                "type": "color"
            },
            "500": {
                "value": "#72827E",
                "type": "color"
            },
            "600": {
                "value": "#5B6763",
                "type": "color"
            },
            "700": {
                "value": "#444B49",
                "type": "color"
            },
            "800": {
                "value": "#2E3331",
                "type": "color"
            },
            "900": {
                "value": "#1D201F",
                "type": "color"
            }
        }
    }
}