#2A3A4D

Accessibility

AAA

11.6:1

Vs white / black

11.6:1 · 1.81:1

Sources

Library color

Codes

Formats

HEX

#2a3a4d

RGB

rgb(42, 58, 77)

RGBA

rgba(42, 58, 77, 1)

HSL

hsl(213, 29%, 23%)

HSLA

hsla(213, 29%, 23%, 1)

HSV

hsv(213, 45%, 30%)

LAB

lab(23.85% -0.69 -13.65)

LCH

lch(23.85% 13.67 267.11)

OKLAB

oklab(0.3431 -0.0115 -0.0379)

OKLCH

oklch(0.3431 0.0396 253.12)

XYZ

xyz(3.81, 4.05, 7.60)

CMYK

cmyk(45%, 25%, 0%, 70%)

CSS

color: #2a3a4d;

CSS variable

--color-2a3a4d: #2a3a4d;

SCSS

$color-2a3a4d: #2a3a4d;

JavaScript

const color = "#2a3a4d";

TypeScript

const color: string = "#2a3a4d";

React

style={{ backgroundColor: "#2a3a4d" }}

JSON

{ "hex": "#2a3a4d", "rgb": { "r": 42, "g": 58, "b": 77 }, "oklch": "oklch(0.3431 0.0396 253.12)" }

Export

Developer code

css

:root {
  --#2a3a4d-1: #2a3a4d;
}

Design systems

Nearest official tokens

An arbitrary HEX is not an official Tailwind, Material, or Bootstrap color. Distance is CIEDE2000.

Nearest Tailwind color

slate-700

Noticeably different · ΔE 2.61 · #334155

Nearest CSS named color

DarkSlateBlue

Very different · ΔE 12.01 · #483D8B

Nearest Material color

blue-grey-900

Very different · ΔE 7.3 · #263238

Nearest Bootstrap color

dark

Very different · ΔE 9.91 · #212529

OKLCH

Perceptual 50–950 scale

Generated in OKLCH from this hex. Not an official Tailwind scale unless the hex itself is a Tailwind token.

50eaf7ff 100dce9fa 200c7d6e9 300aec0d4 40091a3ba 50076889e 600627285 7004d5b6b 8003a4552 90027303a 950141b24

Palette

Tints & shades

Full scale from light tints through the base color into deep shades

edeff0 dcdee1 caced3 b8bdc4 a6adb5 959da6 838c97 717c88 5f6b7a 4e5b6b 3c4a5c 2a3a4d 273547 233040 202c3a 1c2733 18222d 151d27 121820 0e131a 0b0f13 070a0d 040506

Palette

Tints

Mixed toward white — soft backgrounds and highlights

edeff0 dcdee1 caced3 b8bdc4 a6adb5 959da6 838c97 717c88 5f6b7a 4e5b6b 3c4a5c

Palette

Shades

Mixed toward black — depth, text, and emphasis

273547 233040 202c3a 1c2733 18222d 151d27 121820 0e131a 0b0f13 070a0d 040506

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

314051 384656 404c5a 47515e 4e5762 555d67 5c636b 63696f 6b6f73 727478 797a7c

Harmony

Complementary

Opposite on the color wheel for contrast

#2A3A4DStop 1 #4C3C2AStop 2

Harmony

Analogous

Neighbors that sit comfortably together

#2A4A4CStop 1 #2A3A4DStop 2 #2B2A4CStop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#2A3A4DStop 1 #4C2A39Stop 2 #394C2AStop 3

Harmony

Split complementary

Base plus two accents beside the complement

#2A3A4DStop 1 #4C2B2AStop 2 #4A4C2AStop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#243242Stop 1 #3F5773Stop 2 #5B7CA4Stop 3 #8CA3C0Stop 4 #BDCBDBStop 5

Using this color

Where #2a3a4d works

#2A3A4D (#2a3a4d) sits in the blue family at about 213° hue, 29% saturation, and 23% lightness. Contrast is 11.6:1 on white and 1.81:1 on black, so white labels read more clearly on the swatch itself. Nearest Tailwind token: slate-700 (approximation unless the hex is an official scale stop).

Sensible jobs for this swatch

supporting UI accents
text or icons on a white canvas

On a black or near-black UI, #2a3a4d is 1.81:1. Prefer it as a fill, border, or large heading rather than 16px copy.

Family context: Trust, calm, and professionalism. The most used color in SaaS, finance, and healthcare. Common uses still include buttons, charts, and accents in the Blue range — always verify the pair for this exact hex in the contrast checker.

Similar & related colors

Nearby colors from the library by perceptual distance

Midnight Blue#2C3E50 Tailwind slate 700#334155 Tailwind gray 700#374151 Wet Asphalt#34495E Tailwind slate 800#1E293B Tailwind sky 950#082F49 Tailwind gray 800#1F2937 Material Blue Grey 900#263238 Material Blue Grey 800#37474F Tailwind cyan 950#083344 Tailwind zinc 700#3F3F46 Spectrum #324771#324771