#1D317F#1D317F

#1D317F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.134 H 267.7°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#1D317F
RGB	rgb(29, 49, 127)
HSL	hsl(228, 63%, 31%)
HSV	hsv(228, 77%, 50%)
CMYK	cmyk(77.2%, 61.4%, 0%, 50.2%)
CIE-LAB	lab(23.64, 21.77, -46.40)
CIE-LCH	lch(23.64, 51.25, 295.14°)
OKLab	oklab(35% -0.0053 -0.134)
OKLCH	oklch(35% 0.134 267.7)
XYZ	xyz(5.4344, 3.9896, 20.5582)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D317F #7F6B1D

analogous

#1D627F #1D317F #3A1D7F

triadic

#1D317F #7F1D31 #317F1D

tetradic

#1D317F #7F1D62 #7F6B1D #1D7F3A

square

#1D317F #7F1D62 #7F6B1D #1D7F3A

split-complementary

#1D317F #7F3A1D #627F1D

monochromatic

#060B1B #121E4D #1D317F #2844B1 #4260D4

Accessibility & contrast

On white

11.68

#1D317F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1D317F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D317F

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D317F	#FFFFFF	#000000	##FFFFFF
##1D317F	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D82

Deuteranopia (green-blind)

#00347D

Tritanopia (blue-blind)

#004553

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1d317f;
/* rgb */ color: rgb(29, 49, 127);
/* oklch */ color: oklch(35.0% 0.134 267.7);

Tailwind

colors: {
  custom: {
    50: '#6968a5',
    500: '#1d317f',
    950: '#000000',
  },
}

SCSS

$custom: #1d317f;
$custom-light: #6968a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d317f",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 127
  },
  "hsl": {
    "h": 227.755,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.34998,
    "c": 0.13407,
    "h": 267.7
  },
  "luminance": 0.0399
}

Semantic roles & 50–950 ramp

primary

#1D317F

secondary

#B29C45

accent

#C442E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D317F

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

Preview Lab → · Contrast checker → · Palette generator →