#1B3F89#1B3F89

#1B3F89 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.131 H 262.5°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F89
RGB	rgb(27, 63, 137)
HSL	hsl(220, 67%, 32%)
HSV	hsv(220, 80%, 54%)
CMYK	cmyk(80.3%, 54%, 0%, 46.3%)
CIE-LAB	lab(28.36, 15.77, -44.97)
CIE-LCH	lch(28.36, 47.66, 289.32°)
OKLab	oklab(38.79% -0.0171 -0.1296)
OKLCH	oklch(38.79% 0.131 262.5)
XYZ	xyz(6.7432, 5.5934, 24.3863)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F89 #89651B

analogous

#1B7689 #1B3F89 #2E1B89

triadic

#1B3F89 #891B3F #3F891B

tetradic

#1B3F89 #891B76 #89651B #1B892E

square

#1B3F89 #891B76 #89651B #1B892E

split-complementary

#1B3F89 #892E1B #76891B

monochromatic

#071023 #112756 #1B3F89 #2557BC #4475DA

Accessibility & contrast

On white

9.91

#1B3F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1B3F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F89

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F89	#FFFFFF	#000000	##FFFFFF
##1B3F89	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09488C

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b3f89;
/* rgb */ color: rgb(27, 63, 137);
/* oklch */ color: oklch(38.8% 0.131 262.5);

Tailwind

colors: {
  custom: {
    50: '#6a73ac',
    500: '#1b3f89',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f89;
$custom-light: #6a73ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f89",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 220.364,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38788,
    "c": 0.13068,
    "h": 262.5
  },
  "luminance": 0.05594
}

Semantic roles & 50–950 ramp

primary

#1B3F89

secondary

#BC9544

accent

#B23EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3F89

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

Preview Lab → · Contrast checker → · Palette generator →