#1B3E89#1B3E89

#1B3E89 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.132 H 262.9°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E89
RGB	rgb(27, 62, 137)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 54%)
CMYK	cmyk(80.3%, 54.7%, 0%, 46.3%)
CIE-LAB	lab(28.07, 16.47, -45.44)
CIE-LCH	lch(28.07, 48.34, 289.92°)
OKLab	oklab(38.57% -0.0163 -0.131)
OKLCH	oklch(38.57% 0.132 262.9)
XYZ	xyz(6.6884, 5.4836, 24.3680)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E89 #89661B

analogous

#1B7589 #1B3E89 #2F1B89

triadic

#1B3E89 #891B3E #3E891B

tetradic

#1B3E89 #891B75 #89661B #1B892F

square

#1B3E89 #891B75 #89661B #1B892F

split-complementary

#1B3E89 #892F1B #75891B

monochromatic

#071023 #112756 #1B3E89 #2555BC #4474DA

Accessibility & contrast

On white

10.02

#1B3E89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B3E89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E89

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E89	#FFFFFF	#000000	##FFFFFF
##1B3E89	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04488C

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3e89;
/* rgb */ color: rgb(27, 62, 137);
/* oklch */ color: oklch(38.6% 0.132 262.9);

Tailwind

colors: {
  custom: {
    50: '#6a72ac',
    500: '#1b3e89',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e89;
$custom-light: #6a72ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e89",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 137
  },
  "hsl": {
    "h": 220.909,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38566,
    "c": 0.13199,
    "h": 262.9
  },
  "luminance": 0.05484
}

Semantic roles & 50–950 ramp

primary

#1B3E89

secondary

#BC9644

accent

#B33EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3E89

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

Preview Lab → · Contrast checker → · Palette generator →