#1B387B#1B387B

#1B387B is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.1% C 0.120 H 263.8°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B387B
RGB	rgb(27, 56, 123)
HSL	hsl(222, 64%, 29%)
HSV	hsv(222, 78%, 48%)
CMYK	cmyk(78%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(25.23, 14.97, -41.29)
CIE-LCH	lch(25.23, 43.92, 289.92°)
OKLab	oklab(36.07% -0.0129 -0.1189)
OKLCH	oklch(36.07% 0.12 263.8)
XYZ	xyz(5.4400, 4.4908, 19.3152)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B387B #7B5E1B

analogous

#1B687B #1B387B #2E1B7B

triadic

#1B387B #7B1B38 #387B1B

tetradic

#1B387B #7B1B68 #7B5E1B #1B7B2E

square

#1B387B #7B1B68 #7B5E1B #1B7B2E

split-complementary

#1B387B #7B2E1B #687B1B

monochromatic

#060B19 #102149 #1B387B #264FAD #3C6AD4

Accessibility & contrast

On white

11.06

#1B387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B387B

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B387B	#FFFFFF	#000000	##FFFFFF
##1B387B	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09407D

Deuteranopia (green-blind)

#00387A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b387b;
/* rgb */ color: rgb(27, 56, 123);
/* oklch */ color: oklch(36.1% 0.120 263.8);

Tailwind

colors: {
  custom: {
    50: '#676ea2',
    500: '#1b387b',
    950: '#000000',
  },
}

SCSS

$custom: #1b387b;
$custom-light: #676ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b387b",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 221.875,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.36071,
    "c": 0.11956,
    "h": 263.8
  },
  "luminance": 0.04491
}

Semantic roles & 50–950 ramp

primary

#1B387B

secondary

#AF8E43

accent

#B541E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B387B

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

Preview Lab → · Contrast checker → · Palette generator →