What color is #23399A?

#23399A is a dark blue. In RGB it is rgb(35, 57, 154), and in HSL hsl(229, 63%, 37%).

Is #23399A accessible as text?

On white, #23399A has a contrast ratio of 9.89:1 (passes WCAG AA for body text); on black it is 2.12:1 (fails). For text placed on #23399A, use white for the best readability.

What is the closest Tailwind color to #23399A?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #23399A?

#23399A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9A8423. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #23399A below.

Is #23399A good for buttons?

#23399A works well for buttons and highlights, but use white text on #23399A — black text only reaches 2.12:1, below the 4.5:1 needed for normal-size labels.

Is #23399A the same as CSS darkslateblue?

No — #23399A is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#23399A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #23399A

Not just a swatch — here's how #23399A works with other colors. Named schemes with #23399A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #23399A Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Egyptian Blue 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 #23399A Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4460B9

Egyptian 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 Egyptian Blue.

Vintage Leather Lead · 5 colors

Lead #23399A Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

Egyptian 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.

Berry & Cream Lead · 5 colors

Lead #23399A Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #23399A Secondary #5F6C8E Support #9D8F88 Ink #18140F

Egyptian 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 Egyptian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #23399A 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 13/100

Cool

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

Softness 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 63/100

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 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 43/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 71/100

High

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

Surface fit 14/100

Very low

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

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #23399A

For UI

For branding

For interior

For fashion

People also use #23399A with

Bondi Blue Rebecca Purple Olive Gainsboro Gunmetal 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 9.9:1. Use

Subtle surface Use #D0D6ED for cards and hover fills. Tint 80

Avoid beside #35239A — 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 #23399A 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: #23399A;
  --color-base-rgb: 35 57 154;
  --color-base-oklch: oklch(39.4% 0.160 268.1);
  --color-50: #F2F4FD;
  --color-100: #DDE2F8;
  --color-200: #BDC6F0;
  --color-300: #8F9EE0;
  --color-400: #6578CD;
  --color-500: #4357B2;
  --color-600: #3A4888;
  --color-700: #2E3761;
  --color-800: #212740;
  --color-900: #161927;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F2F4FD',
    100: '#DDE2F8',
    200: '#BDC6F0',
    300: '#8F9EE0',
    400: '#6578CD',
    500: '#4357B2',
    600: '#3A4888',
    700: '#2E3761',
    800: '#212740',
    900: '#161927',
  },
}

$base: #23399A;
$base-ink: #FFFFFF;
$base-50: #F2F4FD;
$base-100: #DDE2F8;
$base-200: #BDC6F0;
$base-300: #8F9EE0;
$base-400: #6578CD;
$base-500: #4357B2;
$base-600: #3A4888;
$base-700: #2E3761;
$base-800: #212740;
$base-900: #161927;
$base-hover: #1C2D7B;
$base-subtle: #B8C0E6;

{
    "color": {
        "base": {
            "value": "#23399A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F4FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE2F8",
                "type": "color"
            },
            "200": {
                "value": "#BDC6F0",
                "type": "color"
            },
            "300": {
                "value": "#8F9EE0",
                "type": "color"
            },
            "400": {
                "value": "#6578CD",
                "type": "color"
            },
            "500": {
                "value": "#4357B2",
                "type": "color"
            },
            "600": {
                "value": "#3A4888",
                "type": "color"
            },
            "700": {
                "value": "#2E3761",
                "type": "color"
            },
            "800": {
                "value": "#212740",
                "type": "color"
            },
            "900": {
                "value": "#161927",
                "type": "color"
            }
        }
    }
}

Palettes built on #23399A

Color Lab

Pairs with #23399A

UI roles & guardrails

In real applications

Scales

Every model

Export