#1B387A#1B387A

#1B387A is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.118 H 263.7°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B387A
RGB	rgb(27, 56, 122)
HSL	hsl(222, 64%, 29%)
HSV	hsv(222, 78%, 48%)
CMYK	cmyk(77.9%, 54.1%, 0%, 52.2%)
CIE-LAB	lab(25.16, 14.56, -40.78)
CIE-LCH	lch(25.16, 43.30, 289.65°)
OKLab	oklab(35.99% -0.013 -0.1174)
OKLCH	oklch(35.99% 0.118 263.7)
XYZ	xyz(5.3778, 4.4659, 18.9872)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B387A #7A5D1B

analogous

#1B687A #1B387A #2E1B7A

triadic

#1B387A #7A1B38 #387A1B

tetradic

#1B387A #7A1B68 #7A5D1B #1B7A2E

square

#1B387A #7A1B68 #7A5D1B #1B7A2E

split-complementary

#1B387A #7A2E1B #687A1B

monochromatic

#060C19 #102148 #1B387A #264FAC #3C6AD4

Accessibility & contrast

On white

11.09

#1B387A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1B387A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B387A

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B387A	#FFFFFF	#000000	##FFFFFF
##1B387A	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B407C

Deuteranopia (green-blind)

#003879

Tritanopia (blue-blind)

#004853

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b387a;
/* rgb */ color: rgb(27, 56, 122);
/* oklch */ color: oklch(36.0% 0.118 263.7);

Tailwind

colors: {
  custom: {
    50: '#666ea1',
    500: '#1b387a',
    950: '#000000',
  },
}

SCSS

$custom: #1b387a;
$custom-light: #666ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b387a",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 122
  },
  "hsl": {
    "h": 221.684,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35989,
    "c": 0.11809,
    "h": 263.7
  },
  "luminance": 0.04466
}

Semantic roles & 50–950 ramp

primary

#1B387A

secondary

#AE8D43

accent

#B441E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B387A

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

Preview Lab → · Contrast checker → · Palette generator →