What color is #233A42?

#233A42 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(35, 58, 66), and in HSL hsl(195, 31%, 20%).

Is #233A42 accessible as text?

On white, #233A42 has a contrast ratio of 11.96:1 (passes WCAG AA for body text); on black it is 1.76:1 (fails). For text placed on #233A42, use white for the best readability.

What is the closest Tailwind color to #233A42?

The nearest Tailwind CSS token is gray-700 (#364153).

What colors go well with #233A42?

As a neutral, #233A42 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #233A42 the same as CSS darkslategray?

No — #233A42 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#233A42 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #233A42

Not just a swatch — here's how #233A42 works with other colors. Named schemes with #233A42 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #233A42 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

Gunmetal 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 #233A42 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

Gunmetal 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 #233A42 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #455A62

Gunmetal 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 Gunmetal Gray.

Vintage Leather Lead · 5 colors

Lead #233A42 Secondary #705116 Surface #E2DCC0 Accent #385244 Anchor #56233E

Gunmetal 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 #233A42 Secondary #555D60 Support #969386 Ink #16140F

Gunmetal 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 Gunmetal Gray carrying the quiet middle.

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Color Lab

How #233A42 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 41/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 28/100

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 12/100

Very low

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

UI accent fit 32/100

Low

Workable accent with care around contrast.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #233A42

For UI

For branding

For interior

For fashion

People also use #233A42 with

Hunter Green Prussian Blue Bistre Platinum Dark Slate Gray

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 12.0:1. Use

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

Avoid beside #233043 — 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 #233A42 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: #233A42;
  --color-base-rgb: 35 58 66;
  --color-base-oklch: oklch(33.3% 0.032 221.9);
  --color-50: #F5F9FA;
  --color-100: #E4EEF1;
  --color-200: #CADCE3;
  --color-300: #A4C2CC;
  --color-400: #7FA6B3;
  --color-500: #5F8896;
  --color-600: #4E6B74;
  --color-700: #3B4E54;
  --color-800: #293438;
  --color-900: #1A2123;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5F9FA',
    100: '#E4EEF1',
    200: '#CADCE3',
    300: '#A4C2CC',
    400: '#7FA6B3',
    500: '#5F8896',
    600: '#4E6B74',
    700: '#3B4E54',
    800: '#293438',
    900: '#1A2123',
  },
}

$base: #233A42;
$base-ink: #FFFFFF;
$base-50: #F5F9FA;
$base-100: #E4EEF1;
$base-200: #CADCE3;
$base-300: #A4C2CC;
$base-400: #7FA6B3;
$base-500: #5F8896;
$base-600: #4E6B74;
$base-700: #3B4E54;
$base-800: #293438;
$base-900: #1A2123;
$base-hover: #1C2F35;
$base-subtle: #B3C9D0;

{
    "color": {
        "base": {
            "value": "#233A42",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F9FA",
                "type": "color"
            },
            "100": {
                "value": "#E4EEF1",
                "type": "color"
            },
            "200": {
                "value": "#CADCE3",
                "type": "color"
            },
            "300": {
                "value": "#A4C2CC",
                "type": "color"
            },
            "400": {
                "value": "#7FA6B3",
                "type": "color"
            },
            "500": {
                "value": "#5F8896",
                "type": "color"
            },
            "600": {
                "value": "#4E6B74",
                "type": "color"
            },
            "700": {
                "value": "#3B4E54",
                "type": "color"
            },
            "800": {
                "value": "#293438",
                "type": "color"
            },
            "900": {
                "value": "#1A2123",
                "type": "color"
            }
        }
    }
}