#1B2A83#1B2A83

#1B2A83 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.9% C 0.149 H 269.0°. Best body text is #FFFFFF at 12.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A83
RGB	rgb(27, 42, 131)
HSL	hsl(231, 66%, 31%)
HSV	hsv(231, 79%, 51%)
CMYK	cmyk(79.4%, 67.9%, 0%, 48.6%)
CIE-LAB	lab(22.04, 27.95, -51.53)
CIE-LCH	lch(22.04, 58.62, 298.47°)
OKLab	oklab(33.91% -0.0026 -0.1491)
OKLCH	oklch(33.91% 0.149 269)
XYZ	xyz(5.3753, 3.5270, 21.8658)
Luminance	0.0353 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A83 #83741B

analogous

#1B5E83 #1B2A83 #401B83

triadic

#1B2A83 #831B2A #2A831B

tetradic

#1B2A83 #831B5E #83741B #1B8340

square

#1B2A83 #831B5E #83741B #1B8340

split-complementary

#1B2A83 #83401B #5E831B

monochromatic

#06091E #111A50 #1B2A83 #253AB6 #4156D8

Accessibility & contrast

On white

12.31

#1B2A83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B2A83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A83

12.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A83	#FFFFFF	#000000	##FFFFFF
##1B2A83	1.00	12.31	1.71	12.31
#FFFFFF	12.31	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A86

Deuteranopia (green-blind)

#003081

Tritanopia (blue-blind)

#004252

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2a83;
/* rgb */ color: rgb(27, 42, 131);
/* oklch */ color: oklch(33.9% 0.149 269.0);

Tailwind

colors: {
  custom: {
    50: '#6a63a8',
    500: '#1b2a83',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a83;
$custom-light: #6a63a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a83",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 131
  },
  "hsl": {
    "h": 231.346,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33907,
    "c": 0.14914,
    "h": 269
  },
  "luminance": 0.03528
}

Semantic roles & 50–950 ramp

primary

#1B2A83

secondary

#B6A643

accent

#D03FE9

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#080510

muted

#7A797F

Preview Lab

Preview with #1B2A83

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

Preview Lab → · Contrast checker → · Palette generator →