What color is #2B4E5D?

#2B4E5D is a dark cyan-blue. In RGB it is rgb(43, 78, 93), and in HSL hsl(198, 37%, 27%).

Is #2B4E5D accessible as text?

On white, #2B4E5D has a contrast ratio of 8.93:1 (passes WCAG AA for body text); on black it is 2.35:1 (fails). For text placed on #2B4E5D, use white for the best readability.

What is the closest Tailwind color to #2B4E5D?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #2B4E5D?

#2B4E5D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5E3B2B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2B4E5D below.

Is #2B4E5D good for buttons?

#2B4E5D works well for buttons and highlights, but use white text on #2B4E5D — black text only reaches 2.35:1, below the 4.5:1 needed for normal-size labels.

Is #2B4E5D the same as CSS darkslategray?

No — #2B4E5D is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#2B4E5D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2B4E5D

Not just a swatch — here's how #2B4E5D works with other colors. Named schemes with #2B4E5D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2B4E5D Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Dark Slate 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 #2B4E5D Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Dark Slate 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 #2B4E5D Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #506F7E

Dark Slate 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 Dark Slate Gray.

Vintage Leather Lead · 5 colors

Lead #2B4E5D Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Dark Slate 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 #2B4E5D Secondary #667278 Support #969386 Ink #16140F

Dark Slate 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2B4E5D 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 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 57/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 61/100

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 54/100

Moderate

Workable accent with care around contrast.

Surface fit 44/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2B4E5D

For UI

For branding

For interior

For fashion

People also use #2B4E5D with

Myrtle Green Yale Blue Taupe 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 8.9:1. Use

Subtle surface Use #D0DEE4 for cards and hover fills. Tint 80

Avoid beside #2B3E5E — 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 #2B4E5D 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: #2B4E5D;
  --color-base-rgb: 43 78 93;
  --color-base-oklch: oklch(40.4% 0.048 227.5);
  --color-50: #F4F9FA;
  --color-100: #E3EEF3;
  --color-200: #C7DCE5;
  --color-300: #A0C1CF;
  --color-400: #7AA5B8;
  --color-500: #5A879B;
  --color-600: #4A6A78;
  --color-700: #384D56;
  --color-800: #283439;
  --color-900: #1A2124;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F4F9FA',
    100: '#E3EEF3',
    200: '#C7DCE5',
    300: '#A0C1CF',
    400: '#7AA5B8',
    500: '#5A879B',
    600: '#4A6A78',
    700: '#384D56',
    800: '#283439',
    900: '#1A2124',
  },
}

$base: #2B4E5D;
$base-ink: #FFFFFF;
$base-50: #F4F9FA;
$base-100: #E3EEF3;
$base-200: #C7DCE5;
$base-300: #A0C1CF;
$base-400: #7AA5B8;
$base-500: #5A879B;
$base-600: #4A6A78;
$base-700: #384D56;
$base-800: #283439;
$base-900: #1A2124;
$base-hover: #233F4B;
$base-subtle: #B7CDD7;

{
    "color": {
        "base": {
            "value": "#2B4E5D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F9FA",
                "type": "color"
            },
            "100": {
                "value": "#E3EEF3",
                "type": "color"
            },
            "200": {
                "value": "#C7DCE5",
                "type": "color"
            },
            "300": {
                "value": "#A0C1CF",
                "type": "color"
            },
            "400": {
                "value": "#7AA5B8",
                "type": "color"
            },
            "500": {
                "value": "#5A879B",
                "type": "color"
            },
            "600": {
                "value": "#4A6A78",
                "type": "color"
            },
            "700": {
                "value": "#384D56",
                "type": "color"
            },
            "800": {
                "value": "#283439",
                "type": "color"
            },
            "900": {
                "value": "#1A2124",
                "type": "color"
            }
        }
    }
}

Palettes built on #2B4E5D

Color Lab

Pairs with #2B4E5D

UI roles & guardrails

In real applications

Scales

Every model

Export