What color is #264E57?

#264E57 is a dark cyan. In RGB it is rgb(38, 78, 87), and in HSL hsl(191, 39%, 25%).

Is #264E57 accessible as text?

On white, #264E57 has a contrast ratio of 9.09:1 (passes WCAG AA for body text); on black it is 2.31:1 (fails). For text placed on #264E57, use white for the best readability.

What is the closest Tailwind color to #264E57?

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

What colors go well with #264E57?

#264E57 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #593027. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #264E57 below.

Is #264E57 good for buttons?

#264E57 works well for buttons and highlights, but use white text on #264E57 — black text only reaches 2.31:1, below the 4.5:1 needed for normal-size labels.

Is #264E57 the same as CSS darkslategray?

No — #264E57 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#264E57 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #264E57

Not just a swatch — here's how #264E57 works with other colors. Named schemes with #264E57 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #264E57 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1E3549

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 #264E57 Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 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 #264E57 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #4C6F78

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 #264E57 Secondary #705116 Surface #E3DCC0 Accent #395143 Anchor #56233F

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 #264E57 Secondary #647174 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 #264E57 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 2/100

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 52/100

Moderate

Workable accent with care around contrast.

Surface fit 45/100

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 #264E57

For UI

For branding

For interior

For fashion

People also use #264E57 with

Pine Green Prussian Blue Espresso 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 9.1:1. Use

Subtle surface Use #CEE0E3 for cards and hover fills. Tint 80

Avoid beside #273F59 — 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 #264E57 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: #264E57;
  --color-base-rgb: 38 78 87;
  --color-base-oklch: oklch(39.9% 0.047 214.2);
  --color-50: #F4F9FB;
  --color-100: #E2F0F3;
  --color-200: #C6E0E6;
  --color-300: #9EC8D1;
  --color-400: #79ADB9;
  --color-500: #58909D;
  --color-600: #497079;
  --color-700: #385157;
  --color-800: #27363A;
  --color-900: #192224;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F4F9FB',
    100: '#E2F0F3',
    200: '#C6E0E6',
    300: '#9EC8D1',
    400: '#79ADB9',
    500: '#58909D',
    600: '#497079',
    700: '#385157',
    800: '#27363A',
    900: '#192224',
  },
}

$base: #264E57;
$base-ink: #FFFFFF;
$base-50: #F4F9FB;
$base-100: #E2F0F3;
$base-200: #C6E0E6;
$base-300: #9EC8D1;
$base-400: #79ADB9;
$base-500: #58909D;
$base-600: #497079;
$base-700: #385157;
$base-800: #27363A;
$base-900: #192224;
$base-hover: #1F4047;
$base-subtle: #B5D0D7;

{
    "color": {
        "base": {
            "value": "#264E57",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F9FB",
                "type": "color"
            },
            "100": {
                "value": "#E2F0F3",
                "type": "color"
            },
            "200": {
                "value": "#C6E0E6",
                "type": "color"
            },
            "300": {
                "value": "#9EC8D1",
                "type": "color"
            },
            "400": {
                "value": "#79ADB9",
                "type": "color"
            },
            "500": {
                "value": "#58909D",
                "type": "color"
            },
            "600": {
                "value": "#497079",
                "type": "color"
            },
            "700": {
                "value": "#385157",
                "type": "color"
            },
            "800": {
                "value": "#27363A",
                "type": "color"
            },
            "900": {
                "value": "#192224",
                "type": "color"
            }
        }
    }
}

Palettes built on #264E57

Color Lab

Pairs with #264E57

UI roles & guardrails

In real applications

Scales

Every model

Export