#1D377E#1D377E

#1D377E is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.125 H 265.4°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#1D377E
RGB	rgb(29, 55, 126)
HSL	hsl(224, 63%, 30%)
HSV	hsv(224, 77%, 49%)
CMYK	cmyk(77%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(25.26, 17.16, -43.13)
CIE-LCH	lch(25.26, 46.42, 291.69°)
OKLab	oklab(36.19% -0.0101 -0.1243)
OKLCH	oklch(36.19% 0.125 265.4)
XYZ	xyz(5.6375, 4.4993, 20.3060)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D377E #7E641D

analogous

#1D677E #1D377E #341D7E

triadic

#1D377E #7E1D37 #377E1D

tetradic

#1D377E #7E1D67 #7E641D #1D7E34

square

#1D377E #7E1D67 #7E641D #1D7E34

split-complementary

#1D377E #7E341D #677E1D

monochromatic

#060C1B #12214C #1D377E #284DB0 #4269D3

Accessibility & contrast

On white

11.05

#1D377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1D377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D377E

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D377E	#FFFFFF	#000000	##FFFFFF
##1D377E	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004180

Deuteranopia (green-blind)

#00387D

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d377e;
/* rgb */ color: rgb(29, 55, 126);
/* oklch */ color: oklch(36.2% 0.125 265.4);

Tailwind

colors: {
  custom: {
    50: '#686da4',
    500: '#1d377e',
    950: '#000000',
  },
}

SCSS

$custom: #1d377e;
$custom-light: #686da4;
$custom-dark: #000000;

JSON

{
  "hex": "#1d377e",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 223.918,
    "s": 62.581,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36188,
    "c": 0.12468,
    "h": 265.4
  },
  "luminance": 0.045
}

Semantic roles & 50–950 ramp

primary

#1D377E

secondary

#B19445

accent

#BA42E6

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D377E

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

Preview Lab → · Contrast checker → · Palette generator →