What color is #21607E?

#21607E is a dark cyan-blue. In RGB it is rgb(33, 96, 126), and in HSL hsl(199, 58%, 31%).

Is #21607E accessible as text?

On white, #21607E has a contrast ratio of 6.91:1 (passes WCAG AA for body text); on black it is 3.04:1 (fails). For text placed on #21607E, use white for the best readability.

What is the closest Tailwind color to #21607E?

The nearest Tailwind CSS token is cyan-800 (#005F78).

What colors go well with #21607E?

#21607E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7D3E21. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21607E below.

Is #21607E good for buttons?

#21607E works well for buttons and highlights, but use white text on #21607E — black text only reaches 3.04:1, below the 4.5:1 needed for normal-size labels.

Is #21607E the same as CSS darkslategray?

No — #21607E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#21607E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21607E

Not just a swatch — here's how #21607E works with other colors. Named schemes with #21607E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #21607E Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Lapis Lazuli 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 #21607E Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Lapis Lazuli 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 #21607E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4D839F

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 #21607E Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #21607E Secondary #71848F 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 #21607E 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 26/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 53/100

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 50/100

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 21/100

Low

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

UI accent fit 80/100

High

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

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 80/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #21607E

For UI

For branding

For interior

For fashion

People also use #21607E with

Persian Green Yale Blue Walnut Brown Platinum 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 6.9:1. Use

Subtle surface Use #CDE1EB for cards and hover fills. Tint 80

Avoid beside #21417D — 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 #21607E 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: #21607E;
  --color-base-rgb: 33 96 126;
  --color-base-oklch: oklch(46.3% 0.079 233.0);
  --color-50: #F2F9FC;
  --color-100: #DEEFF7;
  --color-200: #BFDFEE;
  --color-300: #92C5DD;
  --color-400: #69ABC9;
  --color-500: #478DAD;
  --color-600: #3D6E85;
  --color-700: #30505F;
  --color-800: #23363E;
  --color-900: #172126;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F2F9FC',
    100: '#DEEFF7',
    200: '#BFDFEE',
    300: '#92C5DD',
    400: '#69ABC9',
    500: '#478DAD',
    600: '#3D6E85',
    700: '#30505F',
    800: '#23363E',
    900: '#172126',
  },
}

$base: #21607E;
$base-ink: #FFFFFF;
$base-50: #F2F9FC;
$base-100: #DEEFF7;
$base-200: #BFDFEE;
$base-300: #92C5DD;
$base-400: #69ABC9;
$base-500: #478DAD;
$base-600: #3D6E85;
$base-700: #30505F;
$base-800: #23363E;
$base-900: #172126;
$base-hover: #1B4D64;
$base-subtle: #B3D3E1;

{
    "color": {
        "base": {
            "value": "#21607E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEFF7",
                "type": "color"
            },
            "200": {
                "value": "#BFDFEE",
                "type": "color"
            },
            "300": {
                "value": "#92C5DD",
                "type": "color"
            },
            "400": {
                "value": "#69ABC9",
                "type": "color"
            },
            "500": {
                "value": "#478DAD",
                "type": "color"
            },
            "600": {
                "value": "#3D6E85",
                "type": "color"
            },
            "700": {
                "value": "#30505F",
                "type": "color"
            },
            "800": {
                "value": "#23363E",
                "type": "color"
            },
            "900": {
                "value": "#172126",
                "type": "color"
            }
        }
    }
}

Palettes built on #21607E

Color Lab

Pairs with #21607E

UI roles & guardrails

In real applications

Scales

Every model

Export