What color is #08598B?

#08598B is a dark, vivid cyan-blue. In RGB it is rgb(8, 89, 139), and in HSL hsl(203, 89%, 29%).

Is #08598B accessible as text?

On white, #08598B has a contrast ratio of 7.47:1 (passes WCAG AA for body text); on black it is 2.81:1 (fails). For text placed on #08598B, use white for the best readability.

What is the closest Tailwind color to #08598B?

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

What colors go well with #08598B?

#08598B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8C3B08. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #08598B below.

Is #08598B good for buttons?

#08598B works well for buttons and highlights, but use white text on #08598B — black text only reaches 2.81:1, below the 4.5:1 needed for normal-size labels.

Is #08598B the same as CSS darkslateblue?

No — #08598B is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#08598B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #08598B

Not just a swatch — here's how #08598B works with other colors. Named schemes with #08598B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #08598B Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

Classic 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 #08598B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #407CAB

Classic 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 Classic Blue.

Vintage Leather Lead · 5 colors

Lead #08598B Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Classic 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 #08598B Surface #EEE9D6 Anchor #5A2246 Accent #E4C2CB Secondary #322B30

Classic Blue 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 #08598B Secondary #6A7F92 Support #969386 Ink #16140F

Classic 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #08598B 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 19/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 55/100

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 46/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 62/100

High

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

Brand distinctiveness 29/100

Low

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

UI accent fit 85/100

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 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #08598B

For UI

For branding

For interior

For fashion

People also use #08598B with

Jungle Green Phthalo Blue Walnut Brown Platinum 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 7.5:1. Use

Subtle surface Use #C4E0F2 for cards and hover fills. Tint 80

Avoid beside #082D8C — 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 #08598B at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #08598B;
  --color-base-rgb: 8 89 139;
  --color-base-oklch: oklch(44.7% 0.107 244.2);
  --color-50: #F0F9FE;
  --color-100: #D8EFFD;
  --color-200: #B2DFFA;
  --color-300: #7EC5F1;
  --color-400: #4FAAE3;
  --color-500: #2C8DC9;
  --color-600: #2A6E98;
  --color-700: #23506B;
  --color-800: #1B3546;
  --color-900: #13212B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0F9FE',
    100: '#D8EFFD',
    200: '#B2DFFA',
    300: '#7EC5F1',
    400: '#4FAAE3',
    500: '#2C8DC9',
    600: '#2A6E98',
    700: '#23506B',
    800: '#1B3546',
    900: '#13212B',
  },
}

$base: #08598B;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D8EFFD;
$base-200: #B2DFFA;
$base-300: #7EC5F1;
$base-400: #4FAAE3;
$base-500: #2C8DC9;
$base-600: #2A6E98;
$base-700: #23506B;
$base-800: #1B3546;
$base-900: #13212B;
$base-hover: #074770;
$base-subtle: #A4D1ED;

{
    "color": {
        "base": {
            "value": "#08598B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EFFD",
                "type": "color"
            },
            "200": {
                "value": "#B2DFFA",
                "type": "color"
            },
            "300": {
                "value": "#7EC5F1",
                "type": "color"
            },
            "400": {
                "value": "#4FAAE3",
                "type": "color"
            },
            "500": {
                "value": "#2C8DC9",
                "type": "color"
            },
            "600": {
                "value": "#2A6E98",
                "type": "color"
            },
            "700": {
                "value": "#23506B",
                "type": "color"
            },
            "800": {
                "value": "#1B3546",
                "type": "color"
            },
            "900": {
                "value": "#13212B",
                "type": "color"
            }
        }
    }
}