What color is #03151D?

#03151D is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(3, 21, 29), and in HSL hsl(198, 81%, 6%).

Is #03151D accessible as text?

On white, #03151D has a contrast ratio of 18.60:1 (passes WCAG AA for body text); on black it is 1.13:1 (fails). For text placed on #03151D, use white for the best readability.

What is the closest Tailwind color to #03151D?

The nearest Tailwind CSS token is gray-900 (#101828).

What colors go well with #03151D?

As a neutral, #03151D 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 #03151D the same as CSS midnightblue?

No — #03151D 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.

#03151D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03151D

Not just a swatch — here's how #03151D works with other colors. Named schemes with #03151D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #03151D Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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

Nordic Calm Accent · 5 colors

Accent #03151D Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Jet Black keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #03151D Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #20323A

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

Vintage Leather Lead · 5 colors

Lead #03151D Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #03151D Secondary #2F3538 Support #969386 Ink #16140F

Jet Black 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 Jet Black carrying the quiet middle.

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Color Lab

How #03151D 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 41/100

Neutral

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

Softness 20/100

Low

Firm and assertive — carries weight and contrast.

Depth 77/100

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 76/100

High

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

Brand distinctiveness 12/100

Very low

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

UI accent fit 8/100

Very low

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

Surface fit 64/100

High

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

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03151D

For UI

For branding

For interior

For fashion

People also use #03151D with

Bottle Green Jet Black Platinum 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 18.6:1. Use

Subtle surface Use #B3DAEB for cards and hover fills. Tint 80

Avoid beside #030C1C — 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 #03151D 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: #03151D;
  --color-base-rgb: 3 21 29;
  --color-base-oklch: oklch(18.4% 0.030 228.0);
  --color-50: #F1FAFE;
  --color-100: #D9F2FC;
  --color-200: #B5E3F7;
  --color-300: #83CDEC;
  --color-400: #56B4DC;
  --color-500: #3397C2;
  --color-600: #2E7593;
  --color-700: #275468;
  --color-800: #1D3844;
  --color-900: #14232A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1FAFE',
    100: '#D9F2FC',
    200: '#B5E3F7',
    300: '#83CDEC',
    400: '#56B4DC',
    500: '#3397C2',
    600: '#2E7593',
    700: '#275468',
    800: '#1D3844',
    900: '#14232A',
  },
}

$base: #03151D;
$base-ink: #FFFFFF;
$base-50: #F1FAFE;
$base-100: #D9F2FC;
$base-200: #B5E3F7;
$base-300: #83CDEC;
$base-400: #56B4DC;
$base-500: #3397C2;
$base-600: #2E7593;
$base-700: #275468;
$base-800: #1D3844;
$base-900: #14232A;
$base-hover: #021016;
$base-subtle: #8BC9E3;

{
    "color": {
        "base": {
            "value": "#03151D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFE",
                "type": "color"
            },
            "100": {
                "value": "#D9F2FC",
                "type": "color"
            },
            "200": {
                "value": "#B5E3F7",
                "type": "color"
            },
            "300": {
                "value": "#83CDEC",
                "type": "color"
            },
            "400": {
                "value": "#56B4DC",
                "type": "color"
            },
            "500": {
                "value": "#3397C2",
                "type": "color"
            },
            "600": {
                "value": "#2E7593",
                "type": "color"
            },
            "700": {
                "value": "#275468",
                "type": "color"
            },
            "800": {
                "value": "#1D3844",
                "type": "color"
            },
            "900": {
                "value": "#14232A",
                "type": "color"
            }
        }
    }
}

Palettes built on #03151D

Color Lab

Pairs with #03151D

UI roles & guardrails

In real applications

Scales

Every model

Export