#1D377F#1D377F

#1D377F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.3% C 0.126 H 265.5°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#1D377F
RGB	rgb(29, 55, 127)
HSL	hsl(224, 63%, 31%)
HSV	hsv(224, 77%, 50%)
CMYK	cmyk(77.2%, 56.7%, 0%, 50.2%)
CIE-LAB	lab(25.34, 17.56, -43.63)
CIE-LCH	lch(25.34, 47.03, 291.92°)
OKLab	oklab(36.27% -0.01 -0.1257)
OKLCH	oklch(36.27% 0.126 265.5)
XYZ	xyz(5.7023, 4.5253, 20.6475)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D377F #7F651D

analogous

#1D687F #1D377F #341D7F

triadic

#1D377F #7F1D37 #377F1D

tetradic

#1D377F #7F1D68 #7F651D #1D7F34

square

#1D377F #7F1D68 #7F651D #1D7F34

split-complementary

#1D377F #7F341D #687F1D

monochromatic

#060C1B #12214D #1D377F #284DB1 #4269D4

Accessibility & contrast

On white

11.02

#1D377F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1D377F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D377F

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D377F	#FFFFFF	#000000	##FFFFFF
##1D377F	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004182

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d377f;
/* rgb */ color: rgb(29, 55, 127);
/* oklch */ color: oklch(36.3% 0.126 265.5);

Tailwind

colors: {
  custom: {
    50: '#686da5',
    500: '#1d377f',
    950: '#000000',
  },
}

SCSS

$custom: #1d377f;
$custom-light: #686da5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d377f",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 127
  },
  "hsl": {
    "h": 224.082,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36273,
    "c": 0.12614,
    "h": 265.5
  },
  "luminance": 0.04526
}

Semantic roles & 50–950 ramp

primary

#1D377F

secondary

#B29545

accent

#BA42E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D377F

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

Preview Lab → · Contrast checker → · Palette generator →