#1B376D#1B376D

#1B376D is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.7% C 0.100 H 262.0°. Best body text is #FFFFFF at 11.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B376D
RGB	rgb(27, 55, 109)
HSL	hsl(220, 60%, 27%)
HSV	hsv(220, 75%, 43%)
CMYK	cmyk(75.2%, 49.5%, 0%, 57.3%)
CIE-LAB	lab(23.90, 9.94, -34.52)
CIE-LCH	lch(23.90, 35.93, 286.06°)
OKLab	oklab(34.72% -0.0139 -0.099)
OKLCH	oklch(34.72% 0.1 262)
XYZ	xyz(4.5775, 4.0690, 15.0092)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B376D #6D511B

analogous

#1B606D #1B376D #281B6D

triadic

#1B376D #6D1B37 #376D1B

tetradic

#1B376D #6D1B60 #6D511B #1B6D28

square

#1B376D #6D1B60 #6D511B #1B6D28

split-complementary

#1B376D #6D281B #606D1B

monochromatic

#060C19 #0F1E3C #1B376D #27509E #3569CD

Accessibility & contrast

On white

11.58

#1B376D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B376D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B376D

11.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B376D	#FFFFFF	#000000	##FFFFFF
##1B376D	1.00	11.58	1.81	11.58
#FFFFFF	11.58	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3D6F

Deuteranopia (green-blind)

#07356C

Tritanopia (blue-blind)

#00444C

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b376d;
/* rgb */ color: rgb(27, 55, 109);
/* oklch */ color: oklch(34.7% 0.100 262.0);

Tailwind

colors: {
  custom: {
    50: '#636d97',
    500: '#1b376d',
    950: '#000000',
  },
}

SCSS

$custom: #1b376d;
$custom-light: #636d97;
$custom-dark: #000000;

JSON

{
  "hex": "#1b376d",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 109
  },
  "hsl": {
    "h": 219.512,
    "s": 60.294,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34724,
    "c": 0.09996,
    "h": 262
  },
  "luminance": 0.0407
}

Semantic roles & 50–950 ramp

primary

#1B376D

secondary

#A28142

accent

#AD44E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1B376D

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

Preview Lab → · Contrast checker → · Palette generator →