What color is #01403E?

#01403E is a very dark, vivid cyan. In RGB it is rgb(1, 64, 62), and in HSL hsl(178, 97%, 13%).

Is #01403E accessible as text?

On white, #01403E has a contrast ratio of 11.64:1 (passes WCAG AA for body text); on black it is 1.80:1 (fails). For text placed on #01403E, use white for the best readability.

What is the closest Tailwind color to #01403E?

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

What colors go well with #01403E?

#01403E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #410103. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #01403E below.

Is #01403E good for buttons?

#01403E works well for buttons and highlights, but use white text on #01403E — black text only reaches 1.80:1, below the 4.5:1 needed for normal-size labels.

Is #01403E the same as CSS darkslategray?

No — #01403E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#01403E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #01403E

Not just a swatch — here's how #01403E works with other colors. Named schemes with #01403E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #01403E Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

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 #01403E Secondary #AEB4B8 Surface #F1F2F0 Support #7994A4 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.

Vintage Leather Lead · 5 colors

Lead #01403E Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552341

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.

Luxury Packaging Feature · 5 colors

Feature #01403E Anchor #141210 Accent #B9A94D Secondary #1D2C2B Surface #F1EDE3

Bottle 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 #01403E Secondary #50605F 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 #01403E 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 37/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

High

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

Naturalness 13/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 22/100

Low

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

UI accent fit 39/100

Low

Workable accent with care around contrast.

Surface fit 46/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #01403E

For UI

For branding

For interior

For fashion

People also use #01403E with

Dark 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 11.6:1. Use

Subtle surface Use #B4F2F0 for cards and hover fills. Tint 80

Avoid beside #012E41 — 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 #01403E 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: #01403E;
  --color-base-rgb: 1 64 62;
  --color-base-oklch: oklch(33.6% 0.057 191.3);
  --color-50: #F0FEFE;
  --color-100: #D8FDFC;
  --color-200: #B1FCF9;
  --color-300: #79F6F2;
  --color-400: #49E9E4;
  --color-500: #25D0CA;
  --color-600: #259D99;
  --color-700: #206F6C;
  --color-800: #194846;
  --color-900: #112C2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F0FEFE',
    100: '#D8FDFC',
    200: '#B1FCF9',
    300: '#79F6F2',
    400: '#49E9E4',
    500: '#25D0CA',
    600: '#259D99',
    700: '#206F6C',
    800: '#194846',
    900: '#112C2B',
  },
}

$base: #01403E;
$base-ink: #FFFFFF;
$base-50: #F0FEFE;
$base-100: #D8FDFC;
$base-200: #B1FCF9;
$base-300: #79F6F2;
$base-400: #49E9E4;
$base-500: #25D0CA;
$base-600: #259D99;
$base-700: #206F6C;
$base-800: #194846;
$base-900: #112C2B;
$base-hover: #013433;
$base-subtle: #8BEEEA;

{
    "color": {
        "base": {
            "value": "#01403E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEFE",
                "type": "color"
            },
            "100": {
                "value": "#D8FDFC",
                "type": "color"
            },
            "200": {
                "value": "#B1FCF9",
                "type": "color"
            },
            "300": {
                "value": "#79F6F2",
                "type": "color"
            },
            "400": {
                "value": "#49E9E4",
                "type": "color"
            },
            "500": {
                "value": "#25D0CA",
                "type": "color"
            },
            "600": {
                "value": "#259D99",
                "type": "color"
            },
            "700": {
                "value": "#206F6C",
                "type": "color"
            },
            "800": {
                "value": "#194846",
                "type": "color"
            },
            "900": {
                "value": "#112C2B",
                "type": "color"
            }
        }
    }
}