What color is #233D52?

#233D52 is a dark cyan-blue. In RGB it is rgb(35, 61, 82), and in HSL hsl(207, 40%, 23%).

Is #233D52 accessible as text?

On white, #233D52 has a contrast ratio of 11.29:1 (passes WCAG AA for body text); on black it is 1.86:1 (fails). For text placed on #233D52, use white for the best readability.

What is the closest Tailwind color to #233D52?

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

What colors go well with #233D52?

#233D52 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #523823. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #233D52 below.

Is #233D52 good for buttons?

#233D52 works well for buttons and highlights, but use white text on #233D52 — black text only reaches 1.86:1, below the 4.5:1 needed for normal-size labels.

Is #233D52 the same as CSS darkslategray?

No — #233D52 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#233D52 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #233D52

Not just a swatch — here's how #233D52 works with other colors. Named schemes with #233D52 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #233D52 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

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 #233D52 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 #233D52 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #455E72

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 #233D52 Secondary #7F4438 Surface #E1DDC0 Accent #375245 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 #233D52 Secondary #586169 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 #233D52 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 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 33/100

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 19/100

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 47/100

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 #233D52

For UI

For branding

For interior

For fashion

People also use #233D52 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 11.3:1. Use

Subtle surface Use #CCD9E3 for cards and hover fills. Tint 80

Avoid beside #232D52 — 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 #233D52 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: #233D52;
  --color-base-rgb: 35 61 82;
  --color-base-oklch: oklch(34.9% 0.049 244.2);
  --color-50: #F4F8FB;
  --color-100: #E2EBF3;
  --color-200: #C6D8E6;
  --color-300: #9EBAD1;
  --color-400: #789CBA;
  --color-500: #577E9E;
  --color-600: #48637A;
  --color-700: #374958;
  --color-800: #27313A;
  --color-900: #191F24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F4F8FB',
    100: '#E2EBF3',
    200: '#C6D8E6',
    300: '#9EBAD1',
    400: '#789CBA',
    500: '#577E9E',
    600: '#48637A',
    700: '#374958',
    800: '#27313A',
    900: '#191F24',
  },
}

$base: #233D52;
$base-ink: #FFFFFF;
$base-50: #F4F8FB;
$base-100: #E2EBF3;
$base-200: #C6D8E6;
$base-300: #9EBAD1;
$base-400: #789CBA;
$base-500: #577E9E;
$base-600: #48637A;
$base-700: #374958;
$base-800: #27313A;
$base-900: #191F24;
$base-hover: #1C3142;
$base-subtle: #B2C6D6;

{
    "color": {
        "base": {
            "value": "#233D52",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E2EBF3",
                "type": "color"
            },
            "200": {
                "value": "#C6D8E6",
                "type": "color"
            },
            "300": {
                "value": "#9EBAD1",
                "type": "color"
            },
            "400": {
                "value": "#789CBA",
                "type": "color"
            },
            "500": {
                "value": "#577E9E",
                "type": "color"
            },
            "600": {
                "value": "#48637A",
                "type": "color"
            },
            "700": {
                "value": "#374958",
                "type": "color"
            },
            "800": {
                "value": "#27313A",
                "type": "color"
            },
            "900": {
                "value": "#191F24",
                "type": "color"
            }
        }
    }
}