What color is #1B4645?

#1B4645 is a dark cyan. In RGB it is rgb(27, 70, 69), and in HSL hsl(179, 44%, 19%).

Is #1B4645 accessible as text?

On white, #1B4645 has a contrast ratio of 10.46:1 (passes WCAG AA for body text); on black it is 2.01:1 (fails). For text placed on #1B4645, use white for the best readability.

What is the closest Tailwind color to #1B4645?

The nearest Tailwind CSS token is teal-900 (#0B4F4A).

What colors go well with #1B4645?

#1B4645 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #461B1C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1B4645 below.

Is #1B4645 good for buttons?

#1B4645 works well for buttons and highlights, but use white text on #1B4645 — black text only reaches 2.01:1, below the 4.5:1 needed for normal-size labels.

Is #1B4645 the same as CSS darkslategray?

No — #1B4645 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#1B4645 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1B4645

Not just a swatch — here's how #1B4645 works with other colors. Named schemes with #1B4645 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1B4645 Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

Brunswick Green 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 #1B4645 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A4 Anchor #2E3236

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

Vintage Leather Lead · 5 colors

Lead #1B4645 Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552340

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

Luxury Packaging Feature · 5 colors

Feature #1B4645 Anchor #141210 Accent #B9AA4D Secondary #1D2C2C Surface #F1EDE3

Brunswick Green carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #1B4645 Secondary #5A6767 Support #979286 Ink #16140F

Brunswick Green 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 Brunswick Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #1B4645 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 39/100

Neutral

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 10/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 44/100

Moderate

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1B4645

For UI

For branding

For interior

For fashion

People also use #1B4645 with

Hunter Green Prussian Blue Oxblood Platinum Dark Slate Gray

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 10.5:1. Use

Subtle surface Use #C9E3E2 for cards and hover fills. Tint 80

Avoid beside #1B3846 — 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 #1B4645 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: #1B4645;
  --color-base-rgb: 27 70 69;
  --color-base-oklch: oklch(36.4% 0.047 193.2);
  --color-50: #F4FBFB;
  --color-100: #E1F4F4;
  --color-200: #C4E8E7;
  --color-300: #9BD4D3;
  --color-400: #75BDBC;
  --color-500: #54A1A0;
  --color-600: #467C7B;
  --color-700: #365959;
  --color-800: #263B3B;
  --color-900: #192524;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  brunswick-green: {
    50: '#F4FBFB',
    100: '#E1F4F4',
    200: '#C4E8E7',
    300: '#9BD4D3',
    400: '#75BDBC',
    500: '#54A1A0',
    600: '#467C7B',
    700: '#365959',
    800: '#263B3B',
    900: '#192524',
  },
}

$base: #1B4645;
$base-ink: #FFFFFF;
$base-50: #F4FBFB;
$base-100: #E1F4F4;
$base-200: #C4E8E7;
$base-300: #9BD4D3;
$base-400: #75BDBC;
$base-500: #54A1A0;
$base-600: #467C7B;
$base-700: #365959;
$base-800: #263B3B;
$base-900: #192524;
$base-hover: #163837;
$base-subtle: #ACD6D5;

{
    "color": {
        "base": {
            "value": "#1B4645",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FBFB",
                "type": "color"
            },
            "100": {
                "value": "#E1F4F4",
                "type": "color"
            },
            "200": {
                "value": "#C4E8E7",
                "type": "color"
            },
            "300": {
                "value": "#9BD4D3",
                "type": "color"
            },
            "400": {
                "value": "#75BDBC",
                "type": "color"
            },
            "500": {
                "value": "#54A1A0",
                "type": "color"
            },
            "600": {
                "value": "#467C7B",
                "type": "color"
            },
            "700": {
                "value": "#365959",
                "type": "color"
            },
            "800": {
                "value": "#263B3B",
                "type": "color"
            },
            "900": {
                "value": "#192524",
                "type": "color"
            }
        }
    }
}