What color is #031128?

#031128 is a very dark, vivid blue. In RGB it is rgb(3, 17, 40), and in HSL hsl(217, 86%, 8%).

Is #031128 accessible as text?

On white, #031128 has a contrast ratio of 18.84:1 (passes WCAG AA for body text); on black it is 1.11:1 (fails). For text placed on #031128, use white for the best readability.

What is the closest Tailwind color to #031128?

The nearest Tailwind CSS token is mauve-900 (#1D161E).

What colors go well with #031128?

#031128 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #261803. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #031128 below.

Is #031128 good for buttons?

#031128 works well for buttons and highlights, but use white text on #031128 — black text only reaches 1.11:1, below the 4.5:1 needed for normal-size labels.

Is #031128 the same as CSS midnightblue?

No — #031128 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.

#031128 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #031128

Not just a swatch — here's how #031128 works with other colors. Named schemes with #031128 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #031128 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #031128 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #031128 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1F2E45

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 #031128 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223B

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 #031128 Secondary #2D333C Support #9D8F89 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.

Build a working theme in the generator →

Color Lab

How #031128 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 36/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 19/100

Very low

Firm and assertive — carries weight and contrast.

Depth 79/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 79/100

High

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

Brand distinctiveness 20/100

Low

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

UI accent fit 9/100

Very low

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

Surface fit 57/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #031128

For UI

For branding

For interior

For fashion

People also use #031128 with

Brunswick Green Jet Black 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 18.8:1. Use

Subtle surface Use #B3C9ED for cards and hover fills. Tint 80

Avoid beside #030526 — 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 #031128 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: #031128;
  --color-base-rgb: 3 17 40;
  --color-base-oklch: oklch(18.0% 0.052 257.6);
  --color-50: #F0F6FE;
  --color-100: #D8E6FD;
  --color-200: #B3CEF9;
  --color-300: #80ABEF;
  --color-400: #5288E0;
  --color-500: #2F69C6;
  --color-600: #2B5496;
  --color-700: #253F6A;
  --color-800: #1C2C45;
  --color-900: #131C2A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F0F6FE',
    100: '#D8E6FD',
    200: '#B3CEF9',
    300: '#80ABEF',
    400: '#5288E0',
    500: '#2F69C6',
    600: '#2B5496',
    700: '#253F6A',
    800: '#1C2C45',
    900: '#131C2A',
  },
}

$base: #031128;
$base-ink: #FFFFFF;
$base-50: #F0F6FE;
$base-100: #D8E6FD;
$base-200: #B3CEF9;
$base-300: #80ABEF;
$base-400: #5288E0;
$base-500: #2F69C6;
$base-600: #2B5496;
$base-700: #253F6A;
$base-800: #1C2C45;
$base-900: #131C2A;
$base-hover: #020D1E;
$base-subtle: #8BAEE7;

{
    "color": {
        "base": {
            "value": "#031128",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E6FD",
                "type": "color"
            },
            "200": {
                "value": "#B3CEF9",
                "type": "color"
            },
            "300": {
                "value": "#80ABEF",
                "type": "color"
            },
            "400": {
                "value": "#5288E0",
                "type": "color"
            },
            "500": {
                "value": "#2F69C6",
                "type": "color"
            },
            "600": {
                "value": "#2B5496",
                "type": "color"
            },
            "700": {
                "value": "#253F6A",
                "type": "color"
            },
            "800": {
                "value": "#1C2C45",
                "type": "color"
            },
            "900": {
                "value": "#131C2A",
                "type": "color"
            }
        }
    }
}

Palettes built on #031128

Color Lab

Pairs with #031128

UI roles & guardrails

In real applications

Scales

Every model

Export