#1B2D81#1B2D81

#1B2D81 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.3% C 0.143 H 268.2°. Best body text is #FFFFFF at 12.08:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D81
RGB	rgb(27, 45, 129)
HSL	hsl(229, 65%, 31%)
HSV	hsv(229, 79%, 51%)
CMYK	cmyk(79.1%, 65.1%, 0%, 49.4%)
CIE-LAB	lab(22.63, 25.11, -49.30)
CIE-LCH	lch(22.63, 55.33, 296.99°)
OKLab	oklab(34.28% -0.0044 -0.1426)
OKLCH	oklch(34.28% 0.143 268.2)
XYZ	xyz(5.3515, 3.6942, 21.1956)
Luminance	0.0369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D81 #816F1B

analogous

#1B6081 #1B2D81 #3C1B81

triadic

#1B2D81 #811B2D #2D811B

tetradic

#1B2D81 #811B60 #816F1B #1B813C

square

#1B2D81 #811B60 #816F1B #1B813C

split-complementary

#1B2D81 #813C1B #60811B

monochromatic

#060A1C #101B4E #1B2D81 #263FB4 #3F5AD7

Accessibility & contrast

On white

12.08

#1B2D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1B2D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D81

12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D81	#FFFFFF	#000000	##FFFFFF
##1B2D81	1.00	12.08	1.74	12.08
#FFFFFF	12.08	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B84

Deuteranopia (green-blind)

#00317F

Tritanopia (blue-blind)

#004352

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2d81;
/* rgb */ color: rgb(27, 45, 129);
/* oklch */ color: oklch(34.3% 0.143 268.2);

Tailwind

colors: {
  custom: {
    50: '#6965a6',
    500: '#1b2d81',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d81;
$custom-light: #6965a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d81",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 129
  },
  "hsl": {
    "h": 229.412,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.34283,
    "c": 0.14264,
    "h": 268.2
  },
  "luminance": 0.03695
}

Semantic roles & 50–950 ramp

primary

#1B2D81

secondary

#B5A143

accent

#CB3FE8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #1B2D81

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

Preview Lab → · Contrast checker → · Palette generator →