What color is #233F69?

#233F69 is a dark blue. In RGB it is rgb(35, 63, 105), and in HSL hsl(216, 50%, 27%).

Is #233F69 accessible as text?

On white, #233F69 has a contrast ratio of 10.57:1 (passes WCAG AA for body text); on black it is 1.99:1 (fails). For text placed on #233F69, use white for the best readability.

What is the closest Tailwind color to #233F69?

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

What colors go well with #233F69?

#233F69 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #674C22. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #233F69 below.

Is #233F69 good for buttons?

#233F69 works well for buttons and highlights, but use white text on #233F69 — black text only reaches 1.99:1, below the 4.5:1 needed for normal-size labels.

Is #233F69 the same as CSS darkslategray?

No — #233F69 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#233F69 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #233F69

Not just a swatch — here's how #233F69 works with other colors. Named schemes with #233F69 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #233F69 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Yale Blue 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 #233F69 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Yale Blue 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 #233F69 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #466189

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

Vintage Leather Lead · 5 colors

Lead #233F69 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223A

Yale 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 #F6F4EF Accent #233F69 Secondary #5C6676 Support #9D8F89 Ink #16140F

Yale 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 Yale Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #233F69 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 29/100

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

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 43/100

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 31/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 55/100

Moderate

Workable accent with care around contrast.

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #233F69

For UI

For branding

For interior

For fashion

People also use #233F69 with

Teal Green Midnight Blue Sepia 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 10.6:1. Use

Subtle surface Use #CCD7E7 for cards and hover fills. Tint 80

Avoid beside #222767 — 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 #233F69 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: #233F69;
  --color-base-rgb: 35 63 105;
  --color-base-oklch: oklch(36.8% 0.080 258.3);
  --color-50: #F3F7FC;
  --color-100: #E0E8F5;
  --color-200: #C2D2EB;
  --color-300: #97B1D8;
  --color-400: #7091C2;
  --color-500: #4E72A6;
  --color-600: #425B80;
  --color-700: #33435C;
  --color-800: #242E3C;
  --color-900: #181D25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F3F7FC',
    100: '#E0E8F5',
    200: '#C2D2EB',
    300: '#97B1D8',
    400: '#7091C2',
    500: '#4E72A6',
    600: '#425B80',
    700: '#33435C',
    800: '#242E3C',
    900: '#181D25',
  },
}

$base: #233F69;
$base-ink: #FFFFFF;
$base-50: #F3F7FC;
$base-100: #E0E8F5;
$base-200: #C2D2EB;
$base-300: #97B1D8;
$base-400: #7091C2;
$base-500: #4E72A6;
$base-600: #425B80;
$base-700: #33435C;
$base-800: #242E3C;
$base-900: #181D25;
$base-hover: #1C3253;
$base-subtle: #B2C3DC;

{
    "color": {
        "base": {
            "value": "#233F69",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E8F5",
                "type": "color"
            },
            "200": {
                "value": "#C2D2EB",
                "type": "color"
            },
            "300": {
                "value": "#97B1D8",
                "type": "color"
            },
            "400": {
                "value": "#7091C2",
                "type": "color"
            },
            "500": {
                "value": "#4E72A6",
                "type": "color"
            },
            "600": {
                "value": "#425B80",
                "type": "color"
            },
            "700": {
                "value": "#33435C",
                "type": "color"
            },
            "800": {
                "value": "#242E3C",
                "type": "color"
            },
            "900": {
                "value": "#181D25",
                "type": "color"
            }
        }
    }
}