What color is #1B3041?

#1B3041 is a dark cyan-blue. In RGB it is rgb(27, 48, 65), and in HSL hsl(207, 41%, 18%).

Is #1B3041 accessible as text?

On white, #1B3041 has a contrast ratio of 13.59:1 (passes WCAG AA for body text); on black it is 1.55:1 (fails). For text placed on #1B3041, use white for the best readability.

What is the closest Tailwind color to #1B3041?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #1B3041?

#1B3041 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #412C1B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1B3041 below.

Is #1B3041 good for buttons?

#1B3041 works well for buttons and highlights, but use white text on #1B3041 — black text only reaches 1.55:1, below the 4.5:1 needed for normal-size labels.

Is #1B3041 the same as CSS darkslategray?

No — #1B3041 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#1B3041 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1B3041

Not just a swatch — here's how #1B3041 works with other colors. Named schemes with #1B3041 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1B3041 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 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 #1B3041 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 #1B3041 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3C5060

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 #1B3041 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

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 #1B3041 Secondary #4C545A Support #969386 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 #1B3041 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 38/100

Neutral

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 27/100

Low

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

Surface fit 53/100

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 #1B3041

For UI

For branding

For interior

For fashion

People also use #1B3041 with

Dark Slate Gray Navy 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 13.6:1. Use

Subtle surface Use #C9D6E2 for cards and hover fills. Tint 80

Avoid beside #1B2341 — 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 #1B3041 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: #1B3041;
  --color-base-rgb: 27 48 65;
  --color-base-oklch: oklch(30.0% 0.041 244.2);
  --color-50: #F4F8FB;
  --color-100: #E2EBF3;
  --color-200: #C6D8E7;
  --color-300: #9DBAD2;
  --color-400: #779CBB;
  --color-500: #567E9E;
  --color-600: #47637A;
  --color-700: #374958;
  --color-800: #27313A;
  --color-900: #191F24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F4F8FB',
    100: '#E2EBF3',
    200: '#C6D8E7',
    300: '#9DBAD2',
    400: '#779CBB',
    500: '#567E9E',
    600: '#47637A',
    700: '#374958',
    800: '#27313A',
    900: '#191F24',
  },
}

$base: #1B3041;
$base-ink: #FFFFFF;
$base-50: #F4F8FB;
$base-100: #E2EBF3;
$base-200: #C6D8E7;
$base-300: #9DBAD2;
$base-400: #779CBB;
$base-500: #567E9E;
$base-600: #47637A;
$base-700: #374958;
$base-800: #27313A;
$base-900: #191F24;
$base-hover: #162634;
$base-subtle: #ADC2D4;

{
    "color": {
        "base": {
            "value": "#1B3041",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E2EBF3",
                "type": "color"
            },
            "200": {
                "value": "#C6D8E7",
                "type": "color"
            },
            "300": {
                "value": "#9DBAD2",
                "type": "color"
            },
            "400": {
                "value": "#779CBB",
                "type": "color"
            },
            "500": {
                "value": "#567E9E",
                "type": "color"
            },
            "600": {
                "value": "#47637A",
                "type": "color"
            },
            "700": {
                "value": "#374958",
                "type": "color"
            },
            "800": {
                "value": "#27313A",
                "type": "color"
            },
            "900": {
                "value": "#191F24",
                "type": "color"
            }
        }
    }
}