What color is #243F50?

#243F50 is a dark cyan-blue. In RGB it is rgb(36, 63, 80), and in HSL hsl(203, 38%, 23%).

Is #243F50 accessible as text?

On white, #243F50 has a contrast ratio of 11.04:1 (passes WCAG AA for body text); on black it is 1.90:1 (fails). For text placed on #243F50, use white for the best readability.

What is the closest Tailwind color to #243F50?

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

What colors go well with #243F50?

#243F50 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #513524. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #243F50 below.

Is #243F50 good for buttons?

#243F50 works well for buttons and highlights, but use white text on #243F50 — black text only reaches 1.90:1, below the 4.5:1 needed for normal-size labels.

Is #243F50 the same as CSS darkslategray?

No — #243F50 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#243F50 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #243F50

Not just a swatch — here's how #243F50 works with other colors. Named schemes with #243F50 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #243F50 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Charcoal 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 #243F50 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Charcoal 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 #243F50 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #476070

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

Vintage Leather Lead · 5 colors

Lead #243F50 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Charcoal 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 #243F50 Secondary #5A6369 Support #969386 Ink #16140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #243F50 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 37/100

Cool

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

Softness 36/100

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 32/100

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 17/100

Very low

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

UI accent fit 40/100

Moderate

Workable accent with care around contrast.

Surface fit 49/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #243F50

For UI

For branding

For interior

For fashion

People also use #243F50 with

Myrtle Green Prussian Blue Espresso 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 11.0:1. Use

Subtle surface Use #CDDAE2 for cards and hover fills. Tint 80

Avoid beside #243151 — 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 #243F50 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: #243F50;
  --color-base-rgb: 36 63 80;
  --color-base-oklch: oklch(35.4% 0.044 237.5);
  --color-50: #F4F8FB;
  --color-100: #E2EDF3;
  --color-200: #C7DAE6;
  --color-300: #9FBDD0;
  --color-400: #7AA0B8;
  --color-500: #59829C;
  --color-600: #496679;
  --color-700: #384B57;
  --color-800: #27333A;
  --color-900: #192024;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F4F8FB',
    100: '#E2EDF3',
    200: '#C7DAE6',
    300: '#9FBDD0',
    400: '#7AA0B8',
    500: '#59829C',
    600: '#496679',
    700: '#384B57',
    800: '#27333A',
    900: '#192024',
  },
}

$base: #243F50;
$base-ink: #FFFFFF;
$base-50: #F4F8FB;
$base-100: #E2EDF3;
$base-200: #C7DAE6;
$base-300: #9FBDD0;
$base-400: #7AA0B8;
$base-500: #59829C;
$base-600: #496679;
$base-700: #384B57;
$base-800: #27333A;
$base-900: #192024;
$base-hover: #1D3341;
$base-subtle: #B3C8D5;

{
    "color": {
        "base": {
            "value": "#243F50",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E2EDF3",
                "type": "color"
            },
            "200": {
                "value": "#C7DAE6",
                "type": "color"
            },
            "300": {
                "value": "#9FBDD0",
                "type": "color"
            },
            "400": {
                "value": "#7AA0B8",
                "type": "color"
            },
            "500": {
                "value": "#59829C",
                "type": "color"
            },
            "600": {
                "value": "#496679",
                "type": "color"
            },
            "700": {
                "value": "#384B57",
                "type": "color"
            },
            "800": {
                "value": "#27333A",
                "type": "color"
            },
            "900": {
                "value": "#192024",
                "type": "color"
            }
        }
    }
}