What color is #1B2A3B?

#1B2A3B is a very dark blue. In RGB it is rgb(27, 42, 59), and in HSL hsl(212, 37%, 17%).

Is #1B2A3B accessible as text?

On white, #1B2A3B has a contrast ratio of 14.57:1 (passes WCAG AA for body text); on black it is 1.44:1 (fails). For text placed on #1B2A3B, use white for the best readability.

What is the closest Tailwind color to #1B2A3B?

The nearest Tailwind CSS token is mist-800 (#22292B).

What colors go well with #1B2A3B?

#1B2A3B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3B2C1B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1B2A3B below.

Is #1B2A3B good for buttons?

#1B2A3B works well for buttons and highlights, but use white text on #1B2A3B — black text only reaches 1.44:1, below the 4.5:1 needed for normal-size labels.

Is #1B2A3B the same as CSS midnightblue?

No — #1B2A3B is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#1B2A3B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1B2A3B

Not just a swatch — here's how #1B2A3B works with other colors. Named schemes with #1B2A3B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1B2A3B Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Gunmetal Gray 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 #1B2A3B Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Gunmetal Gray 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 #1B2A3B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3B495A

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

Vintage Leather Lead · 5 colors

Lead #1B2A3B Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Gunmetal Gray 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 #1B2A3B Secondary #484E54 Support #959386 Ink #16140F

Gunmetal Gray 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 Gunmetal Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #1B2A3B 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 40/100

Neutral

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

Softness 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

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 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

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

Brand distinctiveness 15/100

Very low

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

UI accent fit 22/100

Low

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

Surface fit 55/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1B2A3B

For UI

For branding

For interior

For fashion

People also use #1B2A3B with

Dark Slate Gray Russian Violet Bistre 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 14.6:1. Use

Subtle surface Use #C9D4E0 for cards and hover fills. Tint 80

Avoid beside #1B203B — 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 #1B2A3B 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: #1B2A3B;
  --color-base-rgb: 27 42 59;
  --color-base-oklch: oklch(28.0% 0.038 252.2);
  --color-50: #F4F7FA;
  --color-100: #E3EAF3;
  --color-200: #C7D5E5;
  --color-300: #A0B6CF;
  --color-400: #7A97B8;
  --color-500: #5A789B;
  --color-600: #4A5F78;
  --color-700: #384656;
  --color-800: #283039;
  --color-900: #1A1E24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F4F7FA',
    100: '#E3EAF3',
    200: '#C7D5E5',
    300: '#A0B6CF',
    400: '#7A97B8',
    500: '#5A789B',
    600: '#4A5F78',
    700: '#384656',
    800: '#283039',
    900: '#1A1E24',
  },
}

$base: #1B2A3B;
$base-ink: #FFFFFF;
$base-50: #F4F7FA;
$base-100: #E3EAF3;
$base-200: #C7D5E5;
$base-300: #A0B6CF;
$base-400: #7A97B8;
$base-500: #5A789B;
$base-600: #4A5F78;
$base-700: #384656;
$base-800: #283039;
$base-900: #1A1E24;
$base-hover: #162230;
$base-subtle: #AEBED1;

{
    "color": {
        "base": {
            "value": "#1B2A3B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FA",
                "type": "color"
            },
            "100": {
                "value": "#E3EAF3",
                "type": "color"
            },
            "200": {
                "value": "#C7D5E5",
                "type": "color"
            },
            "300": {
                "value": "#A0B6CF",
                "type": "color"
            },
            "400": {
                "value": "#7A97B8",
                "type": "color"
            },
            "500": {
                "value": "#5A789B",
                "type": "color"
            },
            "600": {
                "value": "#4A5F78",
                "type": "color"
            },
            "700": {
                "value": "#384656",
                "type": "color"
            },
            "800": {
                "value": "#283039",
                "type": "color"
            },
            "900": {
                "value": "#1A1E24",
                "type": "color"
            }
        }
    }
}