What color is #123737?

#123737 is a very dark cyan. In RGB it is rgb(18, 55, 55), and in HSL hsl(180, 51%, 14%).

Is #123737 accessible as text?

On white, #123737 has a contrast ratio of 12.90:1 (passes WCAG AA for body text); on black it is 1.63:1 (fails). For text placed on #123737, use white for the best readability.

What is the closest Tailwind color to #123737?

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

What colors go well with #123737?

#123737 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #361111. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #123737 below.

Is #123737 good for buttons?

#123737 works well for buttons and highlights, but use white text on #123737 — black text only reaches 1.63:1, below the 4.5:1 needed for normal-size labels.

Is #123737 the same as CSS darkslategray?

No — #123737 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#123737 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #123737

Not just a swatch — here's how #123737 works with other colors. Named schemes with #123737 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #123737 Accent #A6C4BD Surface #E0DABE 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 #123737 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A4 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 #123737 Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552340

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 #123737 Anchor #141210 Accent #B8AA4D Secondary #1D2C2C 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 #123737 Secondary #4C5858 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 #123737 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 40/100

Neutral

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

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

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

Naturalness 8/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 29/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 52/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #123737

For UI

For branding

For interior

For fashion

People also use #123737 with

Castleton Green Graphite 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 12.9:1. Use

Subtle surface Use #C3E3E3 for cards and hover fills. Tint 80

Avoid beside #112A36 — 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 #123737 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: #123737;
  --color-base-rgb: 18 55 55;
  --color-base-oklch: oklch(31.1% 0.042 195.2);
  --color-50: #F3FCFC;
  --color-100: #E0F6F6;
  --color-200: #C1EBEB;
  --color-300: #97D9D9;
  --color-400: #6FC3C3;
  --color-500: #4EA7A7;
  --color-600: #418181;
  --color-700: #335C5C;
  --color-800: #243D3D;
  --color-900: #182626;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F3FCFC',
    100: '#E0F6F6',
    200: '#C1EBEB',
    300: '#97D9D9',
    400: '#6FC3C3',
    500: '#4EA7A7',
    600: '#418181',
    700: '#335C5C',
    800: '#243D3D',
    900: '#182626',
  },
}

$base: #123737;
$base-ink: #FFFFFF;
$base-50: #F3FCFC;
$base-100: #E0F6F6;
$base-200: #C1EBEB;
$base-300: #97D9D9;
$base-400: #6FC3C3;
$base-500: #4EA7A7;
$base-600: #418181;
$base-700: #335C5C;
$base-800: #243D3D;
$base-900: #182626;
$base-hover: #0E2B2B;
$base-subtle: #A4D7D7;

{
    "color": {
        "base": {
            "value": "#123737",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FCFC",
                "type": "color"
            },
            "100": {
                "value": "#E0F6F6",
                "type": "color"
            },
            "200": {
                "value": "#C1EBEB",
                "type": "color"
            },
            "300": {
                "value": "#97D9D9",
                "type": "color"
            },
            "400": {
                "value": "#6FC3C3",
                "type": "color"
            },
            "500": {
                "value": "#4EA7A7",
                "type": "color"
            },
            "600": {
                "value": "#418181",
                "type": "color"
            },
            "700": {
                "value": "#335C5C",
                "type": "color"
            },
            "800": {
                "value": "#243D3D",
                "type": "color"
            },
            "900": {
                "value": "#182626",
                "type": "color"
            }
        }
    }
}