What color is #023339?

#023339 is a very dark, vivid cyan. In RGB it is rgb(2, 51, 57), and in HSL hsl(187, 93%, 12%).

Is #023339 accessible as text?

On white, #023339 has a contrast ratio of 13.68:1 (passes WCAG AA for body text); on black it is 1.54:1 (fails). For text placed on #023339, use white for the best readability.

What is the closest Tailwind color to #023339?

The nearest Tailwind CSS token is teal-950 (#022F2E).

What colors go well with #023339?

#023339 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3B0902. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #023339 below.

Is #023339 good for buttons?

#023339 works well for buttons and highlights, but use white text on #023339 — black text only reaches 1.54:1, below the 4.5:1 needed for normal-size labels.

Is #023339 the same as CSS darkslategray?

No — #023339 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#023339 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #023339

Not just a swatch — here's how #023339 works with other colors. Named schemes with #023339 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #023339 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

Bottle 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 #023339 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

Bottle Green 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 #023339 Surface #14161A Highlight #F4F6F8 Secondary #596671 Accent #2C5258

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

Vintage Leather Lead · 5 colors

Lead #023339 Secondary #715117 Surface #E3DCC0 Accent #395143 Anchor #56233F

Bottle 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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #023339 Secondary #465456 Support #979286 Ink #16140F

Bottle 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 Bottle Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #023339 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 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 4/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

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 19/100

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 51/100

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 #023339

For UI

For branding

For interior

For fashion

People also use #023339 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 13.7:1. Use

Subtle surface Use #B4E9F0 for cards and hover fills. Tint 80

Avoid beside #02213B — 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 #023339 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #023339;
  --color-base-rgb: 2 51 57;
  --color-base-oklch: oklch(29.4% 0.049 207.7);
  --color-50: #F0FDFE;
  --color-100: #D8F9FD;
  --color-200: #B1F3FC;
  --color-300: #7CE6F4;
  --color-400: #4CD4E6;
  --color-500: #29B9CC;
  --color-600: #278D9B;
  --color-700: #22646D;
  --color-800: #1A4247;
  --color-900: #12282B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F0FDFE',
    100: '#D8F9FD',
    200: '#B1F3FC',
    300: '#7CE6F4',
    400: '#4CD4E6',
    500: '#29B9CC',
    600: '#278D9B',
    700: '#22646D',
    800: '#1A4247',
    900: '#12282B',
  },
}

$base: #023339;
$base-ink: #FFFFFF;
$base-50: #F0FDFE;
$base-100: #D8F9FD;
$base-200: #B1F3FC;
$base-300: #7CE6F4;
$base-400: #4CD4E6;
$base-500: #29B9CC;
$base-600: #278D9B;
$base-700: #22646D;
$base-800: #1A4247;
$base-900: #12282B;
$base-hover: #022A2F;
$base-subtle: #8CE0EB;

{
    "color": {
        "base": {
            "value": "#023339",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FDFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F9FD",
                "type": "color"
            },
            "200": {
                "value": "#B1F3FC",
                "type": "color"
            },
            "300": {
                "value": "#7CE6F4",
                "type": "color"
            },
            "400": {
                "value": "#4CD4E6",
                "type": "color"
            },
            "500": {
                "value": "#29B9CC",
                "type": "color"
            },
            "600": {
                "value": "#278D9B",
                "type": "color"
            },
            "700": {
                "value": "#22646D",
                "type": "color"
            },
            "800": {
                "value": "#1A4247",
                "type": "color"
            },
            "900": {
                "value": "#12282B",
                "type": "color"
            }
        }
    }
}