What color is #255B8A?

#255B8A is a dark blue. In RGB it is rgb(37, 91, 138), and in HSL hsl(208, 58%, 34%).

Is #255B8A accessible as text?

On white, #255B8A has a contrast ratio of 7.14:1 (passes WCAG AA for body text); on black it is 2.94:1 (fails). For text placed on #255B8A, use white for the best readability.

What is the closest Tailwind color to #255B8A?

The nearest Tailwind CSS token is sky-800 (#00598A).

What colors go well with #255B8A?

#255B8A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #895324. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #255B8A below.

Is #255B8A good for buttons?

#255B8A works well for buttons and highlights, but use white text on #255B8A — black text only reaches 2.94:1, below the 4.5:1 needed for normal-size labels.

Is #255B8A the same as CSS darkslateblue?

No — #255B8A is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#255B8A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #255B8A

Not just a swatch — here's how #255B8A works with other colors. Named schemes with #255B8A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #255B8A 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 #255B8A Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4F7EAA

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 #255B8A Secondary #7F4438 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 #255B8A Surface #EDE9D6 Anchor #5A2245 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 #255B8A Secondary #708293 Support #969386 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 #255B8A 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 23/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 54/100

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 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 60/100

High

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

Brand distinctiveness 26/100

Low

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

UI accent fit 84/100

Very high

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

Surface fit 26/100

Low

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

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #255B8A

For UI

For branding

For interior

For fashion

People also use #255B8A with

Persian Green Midnight Blue Brown 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 7.1:1. Use

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

Avoid beside #243989 — 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 #255B8A at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #255B8A;
  --color-base-rgb: 37 91 138;
  --color-base-oklch: oklch(45.8% 0.096 248.0);
  --color-50: #F2F8FC;
  --color-100: #DEEBF7;
  --color-200: #BFD8EE;
  --color-300: #92BADD;
  --color-400: #699CC9;
  --color-500: #477EAD;
  --color-600: #3D6385;
  --color-700: #30495F;
  --color-800: #23313E;
  --color-900: #171F26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F2F8FC',
    100: '#DEEBF7',
    200: '#BFD8EE',
    300: '#92BADD',
    400: '#699CC9',
    500: '#477EAD',
    600: '#3D6385',
    700: '#30495F',
    800: '#23313E',
    900: '#171F26',
  },
}

$base: #255B8A;
$base-ink: #FFFFFF;
$base-50: #F2F8FC;
$base-100: #DEEBF7;
$base-200: #BFD8EE;
$base-300: #92BADD;
$base-400: #699CC9;
$base-500: #477EAD;
$base-600: #3D6385;
$base-700: #30495F;
$base-800: #23313E;
$base-900: #171F26;
$base-hover: #1D486E;
$base-subtle: #B6CEE3;

{
    "color": {
        "base": {
            "value": "#255B8A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEBF7",
                "type": "color"
            },
            "200": {
                "value": "#BFD8EE",
                "type": "color"
            },
            "300": {
                "value": "#92BADD",
                "type": "color"
            },
            "400": {
                "value": "#699CC9",
                "type": "color"
            },
            "500": {
                "value": "#477EAD",
                "type": "color"
            },
            "600": {
                "value": "#3D6385",
                "type": "color"
            },
            "700": {
                "value": "#30495F",
                "type": "color"
            },
            "800": {
                "value": "#23313E",
                "type": "color"
            },
            "900": {
                "value": "#171F26",
                "type": "color"
            }
        }
    }
}