What color is #023643?

#023643 is a very dark, vivid cyan. In RGB it is rgb(2, 54, 67), and in HSL hsl(192, 94%, 14%).

Is #023643 accessible as text?

On white, #023643 has a contrast ratio of 13.03:1 (passes WCAG AA for body text); on black it is 1.61:1 (fails). For text placed on #023643, use white for the best readability.

What is the closest Tailwind color to #023643?

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

What colors go well with #023643?

#023643 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #451002. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #023643 below.

Is #023643 good for buttons?

#023643 works well for buttons and highlights, but use white text on #023643 — black text only reaches 1.61:1, below the 4.5:1 needed for normal-size labels.

Is #023643 the same as CSS darkslategray?

No — #023643 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#023643 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #023643

Not just a swatch — here's how #023643 works with other colors. Named schemes with #023643 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #023643 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

Prussian Blue 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 #023643 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

Prussian Blue 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 #023643 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #2E5662

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

Vintage Leather Lead · 5 colors

Lead #023643 Secondary #705116 Surface #E2DCC0 Accent #385244 Anchor #56233E

Prussian Blue 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 #023643 Secondary #49585C Support #969386 Ink #16140F

Prussian Blue 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #023643 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 34/100

Cool

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

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 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

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 21/100

Low

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

UI accent fit 32/100

Low

Workable accent with care around contrast.

Surface fit 48/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #023643

For UI

For branding

For interior

For fashion

People also use #023643 with

Hunter Green Navy 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 13.0:1. Use

Subtle surface Use #B5E5F1 for cards and hover fills. Tint 80

Avoid beside #022145 — 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 #023643 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: #023643;
  --color-base-rgb: 2 54 67;
  --color-base-oklch: oklch(30.8% 0.055 220.1);
  --color-50: #F0FCFE;
  --color-100: #D8F6FD;
  --color-200: #B1EDFC;
  --color-300: #7BDCF4;
  --color-400: #4BC8E7;
  --color-500: #28ACCD;
  --color-600: #26849B;
  --color-700: #215E6D;
  --color-800: #1A3E47;
  --color-900: #12262B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0FCFE',
    100: '#D8F6FD',
    200: '#B1EDFC',
    300: '#7BDCF4',
    400: '#4BC8E7',
    500: '#28ACCD',
    600: '#26849B',
    700: '#215E6D',
    800: '#1A3E47',
    900: '#12262B',
  },
}

$base: #023643;
$base-ink: #FFFFFF;
$base-50: #F0FCFE;
$base-100: #D8F6FD;
$base-200: #B1EDFC;
$base-300: #7BDCF4;
$base-400: #4BC8E7;
$base-500: #28ACCD;
$base-600: #26849B;
$base-700: #215E6D;
$base-800: #1A3E47;
$base-900: #12262B;
$base-hover: #022D37;
$base-subtle: #8ED9EC;

{
    "color": {
        "base": {
            "value": "#023643",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FCFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F6FD",
                "type": "color"
            },
            "200": {
                "value": "#B1EDFC",
                "type": "color"
            },
            "300": {
                "value": "#7BDCF4",
                "type": "color"
            },
            "400": {
                "value": "#4BC8E7",
                "type": "color"
            },
            "500": {
                "value": "#28ACCD",
                "type": "color"
            },
            "600": {
                "value": "#26849B",
                "type": "color"
            },
            "700": {
                "value": "#215E6D",
                "type": "color"
            },
            "800": {
                "value": "#1A3E47",
                "type": "color"
            },
            "900": {
                "value": "#12262B",
                "type": "color"
            }
        }
    }
}