#2B3581#2B3581

#2B3581 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.8% C 0.127 H 272.8°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#2B3581
RGB	rgb(43, 53, 129)
HSL	hsl(233, 50%, 34%)
HSV	hsv(233, 67%, 51%)
CMYK	cmyk(66.7%, 58.9%, 0%, 49.4%)
CIE-LAB	lab(25.70, 21.88, -44.27)
CIE-LCH	lch(25.70, 49.38, 296.30°)
OKLab	oklab(36.8% 0.0062 -0.1273)
OKLCH	oklch(36.8% 0.127 272.8)
XYZ	xyz(6.2305, 4.6442, 21.3327)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B3581 #81772B

analogous

#2B6081 #2B3581 #4C2B81

triadic

#2B3581 #812B35 #35812B

tetradic

#2B3581 #812B60 #81772B #2B814C

square

#2B3581 #812B60 #81772B #2B814C

split-complementary

#2B3581 #814C2B #60812B

monochromatic

#0C0F25 #1C2253 #2B3581 #3A48AF #5D6AC9

Accessibility & contrast

On white

10.89

#2B3581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#2B3581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B3581

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B3581	#FFFFFF	#000000	##FFFFFF
##2B3581	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004184

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #2b3581;
/* rgb */ color: rgb(43, 53, 129);
/* oklch */ color: oklch(36.8% 0.127 272.8);

Tailwind

colors: {
  custom: {
    50: '#6f6ca6',
    500: '#2b3581',
    950: '#000000',
  },
}

SCSS

$custom: #2b3581;
$custom-light: #6f6ca6;
$custom-dark: #000000;

JSON

{
  "hex": "#2b3581",
  "rgb": {
    "r": 43,
    "g": 53,
    "b": 129
  },
  "hsl": {
    "h": 233.023,
    "s": 50,
    "l": 33.725
  },
  "oklch": {
    "l": 0.36799,
    "c": 0.12748,
    "h": 272.8
  },
  "luminance": 0.04645
}

Semantic roles & 50–950 ramp

primary

#2B3581

secondary

#AFA559

accent

#C94EDA

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #2B3581

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

Preview Lab → · Contrast checker → · Palette generator →