What color is #264E63?

#264E63 is a dark cyan-blue. In RGB it is rgb(38, 78, 99), and in HSL hsl(201, 45%, 27%).

Is #264E63 accessible as text?

On white, #264E63 has a contrast ratio of 8.93:1 (passes WCAG AA for body text); on black it is 2.35:1 (fails). For text placed on #264E63, use white for the best readability.

What is the closest Tailwind color to #264E63?

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

What colors go well with #264E63?

#264E63 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #643C26. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #264E63 below.

Is #264E63 good for buttons?

#264E63 works well for buttons and highlights, but use white text on #264E63 — black text only reaches 2.35:1, below the 4.5:1 needed for normal-size labels.

Is #264E63 the same as CSS darkslategray?

No — #264E63 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#264E63 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #264E63

Not just a swatch — here's how #264E63 works with other colors. Named schemes with #264E63 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #264E63 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #264E63 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 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 #264E63 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4C7084

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 #264E63 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #57233D

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 #264E63 Secondary #65727A 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 #264E63 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 33/100

Cool

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 57/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 62/100

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 57/100

Moderate

Workable accent with care around contrast.

Surface fit 41/100

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 #264E63

For UI

For branding

For interior

For fashion

People also use #264E63 with

Viridian Yale Blue Sepia Platinum Charcoal

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 8.9:1. Use

Subtle surface Use #CEDDE6 for cards and hover fills. Tint 80

Avoid beside #263964 — 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 #264E63 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: #264E63;
  --color-base-rgb: 38 78 99;
  --color-base-oklch: oklch(40.4% 0.057 233.5);
  --color-50: #F4F8FB;
  --color-100: #E1EEF4;
  --color-200: #C4DCE8;
  --color-300: #9BC0D5;
  --color-400: #74A4BE;
  --color-500: #5386A2;
  --color-600: #45697D;
  --color-700: #354D5A;
  --color-800: #26343B;
  --color-900: #192025;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F4F8FB',
    100: '#E1EEF4',
    200: '#C4DCE8',
    300: '#9BC0D5',
    400: '#74A4BE',
    500: '#5386A2',
    600: '#45697D',
    700: '#354D5A',
    800: '#26343B',
    900: '#192025',
  },
}

$base: #264E63;
$base-ink: #FFFFFF;
$base-50: #F4F8FB;
$base-100: #E1EEF4;
$base-200: #C4DCE8;
$base-300: #9BC0D5;
$base-400: #74A4BE;
$base-500: #5386A2;
$base-600: #45697D;
$base-700: #354D5A;
$base-800: #26343B;
$base-900: #192025;
$base-hover: #1E3F50;
$base-subtle: #B4CDDA;

{
    "color": {
        "base": {
            "value": "#264E63",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E1EEF4",
                "type": "color"
            },
            "200": {
                "value": "#C4DCE8",
                "type": "color"
            },
            "300": {
                "value": "#9BC0D5",
                "type": "color"
            },
            "400": {
                "value": "#74A4BE",
                "type": "color"
            },
            "500": {
                "value": "#5386A2",
                "type": "color"
            },
            "600": {
                "value": "#45697D",
                "type": "color"
            },
            "700": {
                "value": "#354D5A",
                "type": "color"
            },
            "800": {
                "value": "#26343B",
                "type": "color"
            },
            "900": {
                "value": "#192025",
                "type": "color"
            }
        }
    }
}

Palettes built on #264E63

Color Lab

Pairs with #264E63

UI roles & guardrails

In real applications

Scales

Every model

Export