#1B2C81#1B2C81

#1B2C81 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.1% C 0.144 H 268.5°. Best body text is #FFFFFF at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B2C81
RGB	rgb(27, 44, 129)
HSL	hsl(230, 65%, 31%)
HSV	hsv(230, 79%, 51%)
CMYK	cmyk(79.1%, 65.9%, 0%, 49.4%)
CIE-LAB	lab(22.37, 25.80, -49.74)
CIE-LCH	lch(22.37, 56.03, 297.42°)
OKLab	oklab(34.09% -0.0037 -0.1438)
OKLCH	oklch(34.09% 0.144 268.5)
XYZ	xyz(5.3138, 3.6188, 21.1831)
Luminance	0.0362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2C81 #81701B

analogous

#1B5F81 #1B2C81 #3D1B81

triadic

#1B2C81 #811B2C #2C811B

tetradic

#1B2C81 #811B5F #81701B #1B813D

square

#1B2C81 #811B5F #81701B #1B813D

split-complementary

#1B2C81 #813D1B #5F811B

monochromatic

#06091C #101B4E #1B2C81 #263DB4 #3F59D7

Accessibility & contrast

On white

12.18

#1B2C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B2C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2C81

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2C81	#FFFFFF	#000000	##FFFFFF
##1B2C81	1.00	12.18	1.72	12.18
#FFFFFF	12.18	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A84

Deuteranopia (green-blind)

#00317F

Tritanopia (blue-blind)

#004252

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2c81;
/* rgb */ color: rgb(27, 44, 129);
/* oklch */ color: oklch(34.1% 0.144 268.5);

Tailwind

colors: {
  custom: {
    50: '#6965a6',
    500: '#1b2c81',
    950: '#000000',
  },
}

SCSS

$custom: #1b2c81;
$custom-light: #6965a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2c81",
  "rgb": {
    "r": 27,
    "g": 44,
    "b": 129
  },
  "hsl": {
    "h": 230,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.34088,
    "c": 0.1439,
    "h": 268.5
  },
  "luminance": 0.03619
}

Semantic roles & 50–950 ramp

primary

#1B2C81

secondary

#B5A243

accent

#CC3FE8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #1B2C81

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

Preview Lab → · Contrast checker → · Palette generator →