#1B387C#1B387C

#1B387C is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.121 H 263.9°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B387C
RGB	rgb(27, 56, 124)
HSL	hsl(222, 64%, 30%)
HSV	hsv(222, 78%, 49%)
CMYK	cmyk(78.2%, 54.8%, 0%, 51.4%)
CIE-LAB	lab(25.31, 15.37, -41.79)
CIE-LCH	lch(25.31, 44.53, 290.20°)
OKLab	oklab(36.15% -0.0128 -0.1203)
OKLCH	oklch(36.15% 0.121 263.9)
XYZ	xyz(5.5030, 4.5160, 19.6465)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B387C #7C5F1B

analogous

#1B697C #1B387C #2F1B7C

triadic

#1B387C #7C1B38 #387C1B

tetradic

#1B387C #7C1B69 #7C5F1B #1B7C2F

square

#1B387C #7C1B69 #7C5F1B #1B7C2F

split-complementary

#1B387C #7C2F1B #697C1B

monochromatic

#050B19 #10214A #1B387C #264FAE #3D6AD5

Accessibility & contrast

On white

11.03

#1B387C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B387C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B387C

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B387C	#FFFFFF	#000000	##FFFFFF
##1B387C	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07417E

Deuteranopia (green-blind)

#00387B

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b387c;
/* rgb */ color: rgb(27, 56, 124);
/* oklch */ color: oklch(36.2% 0.121 263.9);

Tailwind

colors: {
  custom: {
    50: '#676ea2',
    500: '#1b387c',
    950: '#000000',
  },
}

SCSS

$custom: #1b387c;
$custom-light: #676ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b387c",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 124
  },
  "hsl": {
    "h": 222.062,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.36154,
    "c": 0.12103,
    "h": 263.9
  },
  "luminance": 0.04517
}

Semantic roles & 50–950 ramp

primary

#1B387C

secondary

#B08F43

accent

#B541E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B387C

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

Preview Lab → · Contrast checker → · Palette generator →