#2B4581#2B4581

#2B4581 is a dark, moderate blue. Relative luminance 0.064; OKLCH L 40.3% C 0.106 H 264.5°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#2B4581
RGB	rgb(43, 69, 129)
HSL	hsl(222, 50%, 34%)
HSV	hsv(222, 67%, 51%)
CMYK	cmyk(66.7%, 46.5%, 0%, 49.4%)
CIE-LAB	lab(30.29, 10.91, -36.87)
CIE-LCH	lch(30.29, 38.45, 286.49°)
OKLab	oklab(40.28% -0.0101 -0.1053)
OKLCH	oklch(40.28% 0.106 264.5)
XYZ	xyz(7.0855, 6.3542, 21.6177)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B4581 #81672B

analogous

#2B7081 #2B4581 #3C2B81

triadic

#2B4581 #812B45 #45812B

tetradic

#2B4581 #812B70 #81672B #2B813C

square

#2B4581 #812B70 #81672B #2B813C

split-complementary

#2B4581 #813C2B #70812B

monochromatic

#0C1425 #1C2C53 #2B4581 #3A5EAF #5D7EC9

Accessibility & contrast

On white

9.25

#2B4581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#2B4581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B4581

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B4581	#FFFFFF	#000000	##FFFFFF
##2B4581	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284C83

Deuteranopia (green-blind)

#1A4480

Tritanopia (blue-blind)

#00535C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #2b4581;
/* rgb */ color: rgb(43, 69, 129);
/* oklch */ color: oklch(40.3% 0.106 264.5);

Tailwind

colors: {
  custom: {
    50: '#6e78a6',
    500: '#2b4581',
    950: '#000000',
  },
}

SCSS

$custom: #2b4581;
$custom-light: #6e78a6;
$custom-dark: #000000;

JSON

{
  "hex": "#2b4581",
  "rgb": {
    "r": 43,
    "g": 69,
    "b": 129
  },
  "hsl": {
    "h": 221.86,
    "s": 50,
    "l": 33.725
  },
  "oklch": {
    "l": 0.40277,
    "c": 0.10581,
    "h": 264.5
  },
  "luminance": 0.06355
}

Semantic roles & 50–950 ramp

primary

#2B4581

secondary

#AF9559

accent

#AF4EDA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #2B4581

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →