#1D397F#1D397F

#1D397F is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.7% C 0.123 H 264.6°. Best body text is #FFFFFF at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#1D397F
RGB	rgb(29, 57, 127)
HSL	hsl(223, 63%, 31%)
HSV	hsv(223, 77%, 50%)
CMYK	cmyk(77.2%, 55.1%, 0%, 50.2%)
CIE-LAB	lab(25.92, 16.15, -42.69)
CIE-LCH	lch(25.92, 45.64, 290.73°)
OKLab	oklab(36.71% -0.0117 -0.1229)
OKLCH	oklch(36.71% 0.123 264.6)
XYZ	xyz(5.7992, 4.7191, 20.6798)
Luminance	0.0472 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D397F #7F631D

analogous

#1D6A7F #1D397F #321D7F

triadic

#1D397F #7F1D39 #397F1D

tetradic

#1D397F #7F1D6A #7F631D #1D7F32

square

#1D397F #7F1D6A #7F631D #1D7F32

split-complementary

#1D397F #7F321D #6A7F1D

monochromatic

#060C1B #12234D #1D397F #284FB1 #426CD4

Accessibility & contrast

On white

10.80

#1D397F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1D397F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D397F

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D397F	#FFFFFF	#000000	##FFFFFF
##1D397F	1.00	10.80	1.94	10.80
#FFFFFF	10.80	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#054281

Deuteranopia (green-blind)

#00397E

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d397f;
/* rgb */ color: rgb(29, 57, 127);
/* oklch */ color: oklch(36.7% 0.123 264.6);

Tailwind

colors: {
  custom: {
    50: '#686ea5',
    500: '#1d397f',
    950: '#000000',
  },
}

SCSS

$custom: #1d397f;
$custom-light: #686ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d397f",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 127
  },
  "hsl": {
    "h": 222.857,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36713,
    "c": 0.12348,
    "h": 264.6
  },
  "luminance": 0.0472
}

Semantic roles & 50–950 ramp

primary

#1D397F

secondary

#B29345

accent

#B742E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D397F

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

Preview Lab → · Contrast checker → · Palette generator →