What color is #23639F?

#23639F is a dark blue. In RGB it is rgb(35, 99, 159), and in HSL hsl(209, 64%, 38%).

Is #23639F accessible as text?

On white, #23639F has a contrast ratio of 6.26:1 (passes WCAG AA for body text); on black it is 3.36:1 (fails). For text placed on #23639F, use white for the best readability.

What is the closest Tailwind color to #23639F?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #23639F?

#23639F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9F5F23. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #23639F below.

Is #23639F good for buttons?

#23639F works well for buttons and highlights, but use white text on #23639F — black text only reaches 3.36:1, below the 4.5:1 needed for normal-size labels.

Is #23639F the same as CSS steelblue?

No — #23639F is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#23639F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #23639F

Not just a swatch — here's how #23639F works with other colors. Named schemes with #23639F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #23639F Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #23639F Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5087BF

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

Vintage Leather Lead · 5 colors

Lead #23639F Secondary #7F4538 Surface #E1DDC0 Accent #375245 Anchor #57233B

Lapis Lazuli plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #23639F Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

Lapis Lazuli sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #23639F Secondary #778BA1 Support #959386 Ink #16140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #23639F 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 18/100

Cool

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

Softness 40/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 51/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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 95/100

Very high

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

Surface fit 18/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #23639F

For UI

For branding

For interior

For fashion

People also use #23639F with

Tiffany Blue Egyptian Blue Sienna Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 6.3:1. Use

Subtle surface Use #D1E0EE for cards and hover fills. Tint 80

Avoid beside #233A9F — 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 #23639F 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: #23639F;
  --color-base-rgb: 35 99 159;
  --color-base-oklch: oklch(49.0% 0.116 250.3);
  --color-50: #F2F8FD;
  --color-100: #DDEBF8;
  --color-200: #BCD7F0;
  --color-300: #8EB9E1;
  --color-400: #649BCE;
  --color-500: #427CB3;
  --color-600: #396289;
  --color-700: #2E4861;
  --color-800: #213140;
  --color-900: #161F27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F2F8FD',
    100: '#DDEBF8',
    200: '#BCD7F0',
    300: '#8EB9E1',
    400: '#649BCE',
    500: '#427CB3',
    600: '#396289',
    700: '#2E4861',
    800: '#213140',
    900: '#161F27',
  },
}

$base: #23639F;
$base-ink: #FFFFFF;
$base-50: #F2F8FD;
$base-100: #DDEBF8;
$base-200: #BCD7F0;
$base-300: #8EB9E1;
$base-400: #649BCE;
$base-500: #427CB3;
$base-600: #396289;
$base-700: #2E4861;
$base-800: #213140;
$base-900: #161F27;
$base-hover: #1C4F7F;
$base-subtle: #B9D0E7;

{
    "color": {
        "base": {
            "value": "#23639F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F8FD",
                "type": "color"
            },
            "100": {
                "value": "#DDEBF8",
                "type": "color"
            },
            "200": {
                "value": "#BCD7F0",
                "type": "color"
            },
            "300": {
                "value": "#8EB9E1",
                "type": "color"
            },
            "400": {
                "value": "#649BCE",
                "type": "color"
            },
            "500": {
                "value": "#427CB3",
                "type": "color"
            },
            "600": {
                "value": "#396289",
                "type": "color"
            },
            "700": {
                "value": "#2E4861",
                "type": "color"
            },
            "800": {
                "value": "#213140",
                "type": "color"
            },
            "900": {
                "value": "#161F27",
                "type": "color"
            }
        }
    }
}

Palettes built on #23639F

Color Lab

Pairs with #23639F

UI roles & guardrails

In real applications

Scales

Every model

Export