#1B2C83#1B2C83

#1B2C83 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.3% C 0.147 H 268.5°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B2C83
RGB	rgb(27, 44, 131)
HSL	hsl(230, 66%, 31%)
HSV	hsv(230, 79%, 51%)
CMYK	cmyk(79.4%, 66.4%, 0%, 48.6%)
CIE-LAB	lab(22.56, 26.59, -50.68)
CIE-LCH	lch(22.56, 57.23, 297.68°)
OKLab	oklab(34.28% -0.0038 -0.1466)
OKLCH	oklch(34.28% 0.147 268.5)
XYZ	xyz(5.4480, 3.6725, 21.8901)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2C83 #83721B

analogous

#1B6083 #1B2C83 #3E1B83

triadic

#1B2C83 #831B2C #2C831B

tetradic

#1B2C83 #831B60 #83721B #1B833E

square

#1B2C83 #831B60 #83721B #1B833E

split-complementary

#1B2C83 #833E1B #60831B

monochromatic

#060A1E #111B50 #1B2C83 #253DB6 #4159D8

Accessibility & contrast

On white

12.11

#1B2C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B2C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2C83

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2C83	#FFFFFF	#000000	##FFFFFF
##1B2C83	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B86

Deuteranopia (green-blind)

#003181

Tritanopia (blue-blind)

#004353

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2c83;
/* rgb */ color: rgb(27, 44, 131);
/* oklch */ color: oklch(34.3% 0.147 268.5);

Tailwind

colors: {
  custom: {
    50: '#6a65a8',
    500: '#1b2c83',
    950: '#000000',
  },
}

SCSS

$custom: #1b2c83;
$custom-light: #6a65a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2c83",
  "rgb": {
    "r": 27,
    "g": 44,
    "b": 131
  },
  "hsl": {
    "h": 230.192,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.34285,
    "c": 0.14668,
    "h": 268.5
  },
  "luminance": 0.03673
}

Semantic roles & 50–950 ramp

primary

#1B2C83

secondary

#B6A443

accent

#CD3FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070510

muted

#7A7A7F

Preview Lab

Preview with #1B2C83

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

Preview Lab → · Contrast checker → · Palette generator →