What color is #425E99?

#425E99 is a medium blue. In RGB it is rgb(66, 94, 153), and in HSL hsl(221, 40%, 43%).

Is #425E99 accessible as text?

On white, #425E99 has a contrast ratio of 6.38:1 (passes WCAG AA for body text); on black it is 3.29:1 (fails). For text placed on #425E99, use white for the best readability.

What is the closest Tailwind color to #425E99?

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

What colors go well with #425E99?

#425E99 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9A7E42. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #425E99 below.

Is #425E99 good for buttons?

#425E99 works well for buttons and highlights, but use white text on #425E99 — black text only reaches 3.29:1, below the 4.5:1 needed for normal-size labels.

Is #425E99 the same as CSS darkslateblue?

No — #425E99 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#425E99 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #425E99

Not just a swatch — here's how #425E99 works with other colors. Named schemes with #425E99 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #425E99 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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 #425E99 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #6782BA

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 #425E99 Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

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 #425E99 Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA 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 #F8F4EF Accent #425E99 Secondary #7E899F Support #9D8F88 Ink #18140F

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 #425E99 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 25/100

Cool

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

Softness 42/100

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 54/100

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 27/100

Low

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

UI accent fit 91/100

Very high

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

Surface fit 23/100

Low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #425E99

For UI

For branding

For interior

For fashion

People also use #425E99 with

Cadet Blue Ultra Violet Shadow 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 6.4:1. Use

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

Avoid beside #43429A — 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 #425E99 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: #425E99;
  --color-base-rgb: 66 94 153;
  --color-base-oklch: oklch(48.8% 0.101 263.8);
  --color-50: #F4F6FB;
  --color-100: #E2E7F3;
  --color-200: #C6D0E6;
  --color-300: #9EAED1;
  --color-400: #788DBA;
  --color-500: #576D9E;
  --color-600: #48587A;
  --color-700: #374158;
  --color-800: #272D3A;
  --color-900: #191D24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F4F6FB',
    100: '#E2E7F3',
    200: '#C6D0E6',
    300: '#9EAED1',
    400: '#788DBA',
    500: '#576D9E',
    600: '#48587A',
    700: '#374158',
    800: '#272D3A',
    900: '#191D24',
  },
}

$base: #425E99;
$base-ink: #FFFFFF;
$base-50: #F4F6FB;
$base-100: #E2E7F3;
$base-200: #C6D0E6;
$base-300: #9EAED1;
$base-400: #788DBA;
$base-500: #576D9E;
$base-600: #48587A;
$base-700: #374158;
$base-800: #272D3A;
$base-900: #191D24;
$base-hover: #354B7B;
$base-subtle: #C6CFE1;

{
    "color": {
        "base": {
            "value": "#425E99",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F6FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E7F3",
                "type": "color"
            },
            "200": {
                "value": "#C6D0E6",
                "type": "color"
            },
            "300": {
                "value": "#9EAED1",
                "type": "color"
            },
            "400": {
                "value": "#788DBA",
                "type": "color"
            },
            "500": {
                "value": "#576D9E",
                "type": "color"
            },
            "600": {
                "value": "#48587A",
                "type": "color"
            },
            "700": {
                "value": "#374158",
                "type": "color"
            },
            "800": {
                "value": "#272D3A",
                "type": "color"
            },
            "900": {
                "value": "#191D24",
                "type": "color"
            }
        }
    }
}

Palettes built on #425E99

Color Lab

Pairs with #425E99

UI roles & guardrails

In real applications

Scales

Every model

Export