What color is #263C4E?

#263C4E is a dark, muted cyan-blue. In RGB it is rgb(38, 60, 78), and in HSL hsl(207, 34%, 23%).

Is #263C4E accessible as text?

On white, #263C4E has a contrast ratio of 11.42:1 (passes WCAG AA for body text); on black it is 1.84:1 (fails). For text placed on #263C4E, use white for the best readability.

What is the closest Tailwind color to #263C4E?

The nearest Tailwind CSS token is mist-700 (#394447).

What colors go well with #263C4E?

#263C4E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4F3927. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #263C4E below.

Is #263C4E good for buttons?

#263C4E works well for buttons and highlights, but use white text on #263C4E — black text only reaches 1.84:1, below the 4.5:1 needed for normal-size labels.

Is #263C4E the same as CSS darkslategray?

No — #263C4E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#263C4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #263C4E

Not just a swatch — here's how #263C4E works with other colors. Named schemes with #263C4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #263C4E Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

Onyx 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 #263C4E Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Onyx 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 #263C4E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #485C6E

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

Vintage Leather Lead · 5 colors

Lead #263C4E Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Onyx 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 #263C4E Secondary #596067 Support #969386 Ink #16140F

Onyx 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 Onyx carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #263C4E 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 38/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

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 38/100

Low

Workable accent with care around contrast.

Surface fit 50/100

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 #263C4E

For UI

For branding

For interior

For fashion

People also use #263C4E with

Myrtle Green Russian Violet Espresso Gainsboro 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 11.4:1. Use

Subtle surface Use #CED9E1 for cards and hover fills. Tint 80

Avoid beside #272F4F — 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 #263C4E 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: #263C4E;
  --color-base-rgb: 38 60 78;
  --color-base-oklch: oklch(34.6% 0.042 244.1);
  --color-50: #F4F8FA;
  --color-100: #E3EBF2;
  --color-200: #C8D8E4;
  --color-300: #A2BACE;
  --color-400: #7D9CB5;
  --color-500: #5C7D98;
  --color-600: #4C6376;
  --color-700: #3A4955;
  --color-800: #283139;
  --color-900: #1A1F23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F4F8FA',
    100: '#E3EBF2',
    200: '#C8D8E4',
    300: '#A2BACE',
    400: '#7D9CB5',
    500: '#5C7D98',
    600: '#4C6376',
    700: '#3A4955',
    800: '#283139',
    900: '#1A1F23',
  },
}

$base: #263C4E;
$base-ink: #FFFFFF;
$base-50: #F4F8FA;
$base-100: #E3EBF2;
$base-200: #C8D8E4;
$base-300: #A2BACE;
$base-400: #7D9CB5;
$base-500: #5C7D98;
$base-600: #4C6376;
$base-700: #3A4955;
$base-800: #283139;
$base-900: #1A1F23;
$base-hover: #1F313F;
$base-subtle: #B5C6D3;

{
    "color": {
        "base": {
            "value": "#263C4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E3EBF2",
                "type": "color"
            },
            "200": {
                "value": "#C8D8E4",
                "type": "color"
            },
            "300": {
                "value": "#A2BACE",
                "type": "color"
            },
            "400": {
                "value": "#7D9CB5",
                "type": "color"
            },
            "500": {
                "value": "#5C7D98",
                "type": "color"
            },
            "600": {
                "value": "#4C6376",
                "type": "color"
            },
            "700": {
                "value": "#3A4955",
                "type": "color"
            },
            "800": {
                "value": "#283139",
                "type": "color"
            },
            "900": {
                "value": "#1A1F23",
                "type": "color"
            }
        }
    }
}