What color is #154B59?

#154B59 is a dark cyan. In RGB it is rgb(21, 75, 89), and in HSL hsl(192, 62%, 22%).

Is #154B59 accessible as text?

On white, #154B59 has a contrast ratio of 9.62:1 (passes WCAG AA for body text); on black it is 2.18:1 (fails). For text placed on #154B59, use white for the best readability.

What is the closest Tailwind color to #154B59?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #154B59?

#154B59 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5B2315. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #154B59 below.

Is #154B59 good for buttons?

#154B59 works well for buttons and highlights, but use white text on #154B59 — black text only reaches 2.18:1, below the 4.5:1 needed for normal-size labels.

Is #154B59 the same as CSS darkslategray?

No — #154B59 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#154B59 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #154B59

Not just a swatch — here's how #154B59 works with other colors. Named schemes with #154B59 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #154B59 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

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

Nordic Calm Accent · 5 colors

Accent #154B59 Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 Anchor #2E3236

Dark Slate Gray keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #154B59 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #3F6C79

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

Vintage Leather Lead · 5 colors

Lead #154B59 Secondary #705116 Surface #E3DCC0 Accent #395244 Anchor #56233E

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #154B59 Secondary #5D6D72 Support #969386 Ink #16140F

Dark Slate Gray 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #154B59 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 33/100

Cool

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 38/100

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 23/100

Low

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

UI accent fit 53/100

Moderate

Workable accent with care around contrast.

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #154B59

For UI

For branding

For interior

For fashion

People also use #154B59 with

Pine Green Navy Rosewood Platinum Dark Slate 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 9.6:1. Use

Subtle surface Use #C5E2E9 for cards and hover fills. Tint 80

Avoid beside #15365B — 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 #154B59 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: #154B59;
  --color-base-rgb: 21 75 89;
  --color-base-oklch: oklch(38.5% 0.060 218.7);
  --color-50: #F2FAFD;
  --color-100: #DDF3F8;
  --color-200: #BDE5EF;
  --color-300: #90D0E0;
  --color-400: #66B8CC;
  --color-500: #449BB1;
  --color-600: #3A7887;
  --color-700: #2E5660;
  --color-800: #22393F;
  --color-900: #162427;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F2FAFD',
    100: '#DDF3F8',
    200: '#BDE5EF',
    300: '#90D0E0',
    400: '#66B8CC',
    500: '#449BB1',
    600: '#3A7887',
    700: '#2E5660',
    800: '#22393F',
    900: '#162427',
  },
}

$base: #154B59;
$base-ink: #FFFFFF;
$base-50: #F2FAFD;
$base-100: #DDF3F8;
$base-200: #BDE5EF;
$base-300: #90D0E0;
$base-400: #66B8CC;
$base-500: #449BB1;
$base-600: #3A7887;
$base-700: #2E5660;
$base-800: #22393F;
$base-900: #162427;
$base-hover: #113E49;
$base-subtle: #A7D4DF;

{
    "color": {
        "base": {
            "value": "#154B59",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF3F8",
                "type": "color"
            },
            "200": {
                "value": "#BDE5EF",
                "type": "color"
            },
            "300": {
                "value": "#90D0E0",
                "type": "color"
            },
            "400": {
                "value": "#66B8CC",
                "type": "color"
            },
            "500": {
                "value": "#449BB1",
                "type": "color"
            },
            "600": {
                "value": "#3A7887",
                "type": "color"
            },
            "700": {
                "value": "#2E5660",
                "type": "color"
            },
            "800": {
                "value": "#22393F",
                "type": "color"
            },
            "900": {
                "value": "#162427",
                "type": "color"
            }
        }
    }
}

Palettes built on #154B59

Color Lab

Pairs with #154B59

UI roles & guardrails

In real applications

Scales

Every model

Export