#1B2383#1B2383

#1B2383 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.7% C 0.157 H 270.4°. Best body text is #FFFFFF at 13.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B2383
RGB	rgb(27, 35, 131)
HSL	hsl(235, 66%, 31%)
HSV	hsv(235, 79%, 51%)
CMYK	cmyk(79.4%, 73.3%, 0%, 48.6%)
CIE-LAB	lab(20.33, 32.57, -54.34)
CIE-LCH	lch(20.33, 63.35, 300.94°)
OKLab	oklab(32.67% 0.0012 -0.1573)
OKLCH	oklch(32.67% 0.157 270.4)
XYZ	xyz(5.1484, 3.0732, 21.7902)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2383 #837B1B

analogous

#1B5783 #1B2383 #471B83

triadic

#1B2383 #831B23 #23831B

tetradic

#1B2383 #831B57 #837B1B #1B8347

square

#1B2383 #831B57 #837B1B #1B8347

split-complementary

#1B2383 #83471B #57831B

monochromatic

#06081E #111550 #1B2383 #2531B6 #414CD8

Accessibility & contrast

On white

13.00

#1B2383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B2383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2383

13.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2383	#FFFFFF	#000000	##FFFFFF
##1B2383	1.00	13.00	1.61	13.00
#FFFFFF	13.00	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003686

Deuteranopia (green-blind)

#002C81

Tritanopia (blue-blind)

#003E50

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b2383;
/* rgb */ color: rgb(27, 35, 131);
/* oklch */ color: oklch(32.7% 0.157 270.4);

Tailwind

colors: {
  custom: {
    50: '#6b5ea8',
    500: '#1b2383',
    950: '#000000',
  },
}

SCSS

$custom: #1b2383;
$custom-light: #6b5ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2383",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 131
  },
  "hsl": {
    "h": 235.385,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.32669,
    "c": 0.15733,
    "h": 270.4
  },
  "luminance": 0.03074
}

Semantic roles & 50–950 ramp

primary

#1B2383

secondary

#B6AE43

accent

#DC3FE9

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080410

muted

#7A797F

Preview Lab

Preview with #1B2383

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

Preview Lab → · Contrast checker → · Palette generator →