What color is #263F73?

#263F73 is a dark blue. In RGB it is rgb(38, 63, 115), and in HSL hsl(221, 50%, 30%).

Is #263F73 accessible as text?

On white, #263F73 has a contrast ratio of 10.29:1 (passes WCAG AA for body text); on black it is 2.04:1 (fails). For text placed on #263F73, use white for the best readability.

What is the closest Tailwind color to #263F73?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #263F73?

#263F73 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #735B26. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #263F73 below.

Is #263F73 good for buttons?

#263F73 works well for buttons and highlights, but use white text on #263F73 — black text only reaches 2.04:1, below the 4.5:1 needed for normal-size labels.

Is #263F73 the same as CSS darkslateblue?

No — #263F73 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#263F73 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #263F73

Not just a swatch — here's how #263F73 works with other colors. Named schemes with #263F73 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #263F73 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Classic Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Luxury Packaging Feature · 5 colors

Feature #263F73 Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F0EEE3

Classic Blue 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.

Moody Editorial Color · 5 colors

Color #263F73 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #1E1E42

Classic Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Classic Blue.

Vintage Leather Lead · 5 colors

Lead #263F73 Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

Classic Blue 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 #F8F4EF Accent #263F73 Secondary #5E687B Support #9D8F88 Ink #18140F

Classic Blue 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #263F73 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 27/100

Cool

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 45/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 36/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 61/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 32/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #263F73

For UI

For branding

For interior

For fashion

People also use #263F73 with

Dark Cyan Indigo Coffee 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 10.3:1. Use

Subtle surface Use #CED7E8 for cards and hover fills. Tint 80

Avoid beside #282673 — 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 #263F73 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: #263F73;
  --color-base-rgb: 38 63 115;
  --color-base-oklch: oklch(37.6% 0.094 263.2);
  --color-50: #F3F6FC;
  --color-100: #E0E7F5;
  --color-200: #C2CFEB;
  --color-300: #97ACD8;
  --color-400: #708AC2;
  --color-500: #4E6AA6;
  --color-600: #425580;
  --color-700: #33405C;
  --color-800: #242C3C;
  --color-900: #181C25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F3F6FC',
    100: '#E0E7F5',
    200: '#C2CFEB',
    300: '#97ACD8',
    400: '#708AC2',
    500: '#4E6AA6',
    600: '#425580',
    700: '#33405C',
    800: '#242C3C',
    900: '#181C25',
  },
}

$base: #263F73;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #E0E7F5;
$base-200: #C2CFEB;
$base-300: #97ACD8;
$base-400: #708AC2;
$base-500: #4E6AA6;
$base-600: #425580;
$base-700: #33405C;
$base-800: #242C3C;
$base-900: #181C25;
$base-hover: #1F325C;
$base-subtle: #B5C2DE;

{
    "color": {
        "base": {
            "value": "#263F73",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E7F5",
                "type": "color"
            },
            "200": {
                "value": "#C2CFEB",
                "type": "color"
            },
            "300": {
                "value": "#97ACD8",
                "type": "color"
            },
            "400": {
                "value": "#708AC2",
                "type": "color"
            },
            "500": {
                "value": "#4E6AA6",
                "type": "color"
            },
            "600": {
                "value": "#425580",
                "type": "color"
            },
            "700": {
                "value": "#33405C",
                "type": "color"
            },
            "800": {
                "value": "#242C3C",
                "type": "color"
            },
            "900": {
                "value": "#181C25",
                "type": "color"
            }
        }
    }
}

Palettes built on #263F73

Color Lab

Pairs with #263F73

UI roles & guardrails

In real applications

Scales

Every model

Export