#1B389F#1B389F

#1B389F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.3% C 0.170 H 266.1°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B389F
RGB	rgb(27, 56, 159)
HSL	hsl(227, 71%, 36%)
HSV	hsv(227, 83%, 62%)
CMYK	cmyk(83%, 64.8%, 0%, 37.6%)
CIE-LAB	lab(28.28, 29.35, -58.59)
CIE-LCH	lch(28.28, 65.53, 296.61°)
OKLab	oklab(39.3% -0.0115 -0.1696)
OKLCH	oklch(39.3% 0.17 266.1)
XYZ	xyz(8.1220, 5.5636, 33.4400)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B389F #9F821B

analogous

#1B7A9F #1B389F #401B9F

triadic

#1B389F #9F1B38 #389F1B

tetradic

#1B389F #9F1B7A #9F821B #1B9F40

square

#1B389F #9F1B7A #9F821B #1B9F40

split-complementary

#1B389F #9F401B #7A9F1B

monochromatic

#091336 #12266B #1B389F #244AD3 #5372E2

Accessibility & contrast

On white

9.94

#1B389F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B389F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B389F

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B389F	#FFFFFF	#000000	##FFFFFF
##1B389F	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A2

Deuteranopia (green-blind)

#003D9D

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b389f;
/* rgb */ color: rgb(27, 56, 159);
/* oklch */ color: oklch(39.3% 0.170 266.1);

Tailwind

colors: {
  custom: {
    50: '#706ebc',
    500: '#1b389f',
    950: '#000000',
  },
}

SCSS

$custom: #1b389f;
$custom-light: #706ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b389f",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 159
  },
  "hsl": {
    "h": 226.818,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39304,
    "c": 0.17003,
    "h": 266.1
  },
  "luminance": 0.05565
}

Semantic roles & 50–950 ramp

primary

#1B389F

secondary

#C5AB51

accent

#C63AEE

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B389F

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

Preview Lab → · Contrast checker → · Palette generator →