What color is #151D23?

#151D23 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(21, 29, 35), and in HSL hsl(206, 25%, 11%).

Is #151D23 accessible as text?

On white, #151D23 has a contrast ratio of 17.05:1 (passes WCAG AA for body text); on black it is 1.23:1 (fails). For text placed on #151D23, use white for the best readability.

What is the closest Tailwind color to #151D23?

The nearest Tailwind CSS token is zinc-900 (#18181B).

What colors go well with #151D23?

As a neutral, #151D23 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 #151D23 the same as CSS midnightblue?

No — #151D23 is not the CSS named color midnightblue, but midnightblue (#191970) 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.

#151D23 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #151D23

Not just a swatch — here's how #151D23 works with other colors. Named schemes with #151D23 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #151D23 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #333B41

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

Vintage Leather Lead · 5 colors

Lead #151D23 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Graphite 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 #151D23 Surface #ECEADC Highlight #F4F2E7 Secondary #B2B2A0 Ink #2A2823

Graphite 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.

Coastal Morning Lead · 5 colors

Lead #151D23 Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Graphite opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #151D23 Secondary #3C3F41 Support #969386 Ink #16140F

Graphite 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 Graphite carrying the quiet middle.

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Color Lab

How #151D23 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 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 72/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 19/100

Very low

Clean and current — no dusty, aged cast.

Luxury 72/100

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 11/100

Very low

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

Surface fit 65/100

High

Calm enough for large fills — backgrounds, cards, sections.

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #151D23

For UI

For branding

For interior

For fashion

People also use #151D23 with

Onyx Graphite Gainsboro Charcoal

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 17.0:1. Use

Subtle surface Use #C9D3DA for cards and hover fills. Tint 80

Avoid beside #151823 — 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 #151D23 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: #151D23;
  --color-base-rgb: 21 29 35;
  --color-base-oklch: oklch(22.6% 0.017 240.9);
  --color-50: #F5F8F9;
  --color-100: #E5EBF0;
  --color-200: #CCD8E0;
  --color-300: #A7BAC8;
  --color-400: #849CAE;
  --color-500: #647D90;
  --color-600: #516370;
  --color-700: #3D4951;
  --color-800: #2A3136;
  --color-900: #1B1F22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  graphite: {
    50: '#F5F8F9',
    100: '#E5EBF0',
    200: '#CCD8E0',
    300: '#A7BAC8',
    400: '#849CAE',
    500: '#647D90',
    600: '#516370',
    700: '#3D4951',
    800: '#2A3136',
    900: '#1B1F22',
  },
}

$base: #151D23;
$base-ink: #FFFFFF;
$base-50: #F5F8F9;
$base-100: #E5EBF0;
$base-200: #CCD8E0;
$base-300: #A7BAC8;
$base-400: #849CAE;
$base-500: #647D90;
$base-600: #516370;
$base-700: #3D4951;
$base-800: #2A3136;
$base-900: #1B1F22;
$base-hover: #11171C;
$base-subtle: #AEBDC8;

{
    "color": {
        "base": {
            "value": "#151D23",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F8F9",
                "type": "color"
            },
            "100": {
                "value": "#E5EBF0",
                "type": "color"
            },
            "200": {
                "value": "#CCD8E0",
                "type": "color"
            },
            "300": {
                "value": "#A7BAC8",
                "type": "color"
            },
            "400": {
                "value": "#849CAE",
                "type": "color"
            },
            "500": {
                "value": "#647D90",
                "type": "color"
            },
            "600": {
                "value": "#516370",
                "type": "color"
            },
            "700": {
                "value": "#3D4951",
                "type": "color"
            },
            "800": {
                "value": "#2A3136",
                "type": "color"
            },
            "900": {
                "value": "#1B1F22",
                "type": "color"
            }
        }
    }
}

Palettes built on #151D23

Color Lab

Pairs with #151D23

UI roles & guardrails

In real applications

Scales

Every model

Export