#1B4289#1B4289

#1B4289 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.5% C 0.127 H 261.2°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B4289
RGB	rgb(27, 66, 137)
HSL	hsl(219, 67%, 32%)
HSV	hsv(219, 80%, 54%)
CMYK	cmyk(80.3%, 51.8%, 0%, 46.3%)
CIE-LAB	lab(29.25, 13.69, -43.54)
CIE-LCH	lch(29.25, 45.64, 287.45°)
OKLab	oklab(39.46% -0.0195 -0.1253)
OKLCH	oklch(39.46% 0.127 261.2)
XYZ	xyz(6.9139, 5.9348, 24.4432)
Luminance	0.0594 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4289 #89621B

analogous

#1B7989 #1B4289 #2B1B89

triadic

#1B4289 #891B42 #42891B

tetradic

#1B4289 #891B79 #89621B #1B892B

square

#1B4289 #891B79 #89621B #1B892B

split-complementary

#1B4289 #892B1B #79891B

monochromatic

#071123 #112956 #1B4289 #255BBC #4479DA

Accessibility & contrast

On white

9.60

#1B4289 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1B4289 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4289

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4289	#FFFFFF	#000000	##FFFFFF
##1B4289	1.00	9.60	2.19	9.60
#FFFFFF	9.60	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164A8C

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#00535F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4289;
/* rgb */ color: rgb(27, 66, 137);
/* oklch */ color: oklch(39.5% 0.127 261.2);

Tailwind

colors: {
  custom: {
    50: '#6a75ac',
    500: '#1b4289',
    950: '#000000',
  },
}

SCSS

$custom: #1b4289;
$custom-light: #6a75ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4289",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 137
  },
  "hsl": {
    "h": 218.727,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.39463,
    "c": 0.12679,
    "h": 261.2
  },
  "luminance": 0.05936
}

Semantic roles & 50–950 ramp

primary

#1B4289

secondary

#BC9144

accent

#AD3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4289

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

Preview Lab → · Contrast checker → · Palette generator →