#1B387D#1B387D

#1B387D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.122 H 264.0°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B387D
RGB	rgb(27, 56, 125)
HSL	hsl(222, 64%, 30%)
HSV	hsv(222, 78%, 49%)
CMYK	cmyk(78.4%, 55.2%, 0%, 51%)
CIE-LAB	lab(25.39, 15.78, -42.30)
CIE-LCH	lch(25.39, 45.15, 290.46°)
OKLab	oklab(36.24% -0.0127 -0.1218)
OKLCH	oklch(36.24% 0.123 264)
XYZ	xyz(5.5665, 4.5414, 19.9813)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B387D #7D601B

analogous

#1B697D #1B387D #2F1B7D

triadic

#1B387D #7D1B38 #387D1B

tetradic

#1B387D #7D1B69 #7D601B #1B7D2F

square

#1B387D #7D1B69 #7D601B #1B7D2F

split-complementary

#1B387D #7D2F1B #697D1B

monochromatic

#050B19 #10214B #1B387D #264FAF #3D6AD5

Accessibility & contrast

On white

11.00

#1B387D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1B387D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B387D

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B387D	#FFFFFF	#000000	##FFFFFF
##1B387D	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04417F

Deuteranopia (green-blind)

#00387C

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b387d;
/* rgb */ color: rgb(27, 56, 125);
/* oklch */ color: oklch(36.2% 0.122 264.0);

Tailwind

colors: {
  custom: {
    50: '#676ea3',
    500: '#1b387d',
    950: '#000000',
  },
}

SCSS

$custom: #1b387d;
$custom-light: #676ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b387d",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 125
  },
  "hsl": {
    "h": 222.245,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.36237,
    "c": 0.1225,
    "h": 264
  },
  "luminance": 0.04542
}

Semantic roles & 50–950 ramp

primary

#1B387D

secondary

#B19043

accent

#B640E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B387D

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

Preview Lab → · Contrast checker → · Palette generator →