#1D317B#1D317B

#1D317B is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.6% C 0.128 H 267.6°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#1D317B
RGB	rgb(29, 49, 123)
HSL	hsl(227, 62%, 30%)
HSV	hsv(227, 76%, 48%)
CMYK	cmyk(76.4%, 60.2%, 0%, 51.8%)
CIE-LAB	lab(23.30, 20.18, -44.43)
CIE-LCH	lch(23.30, 48.79, 294.43°)
OKLab	oklab(34.64% -0.0054 -0.1282)
OKLCH	oklch(34.64% 0.128 267.6)
XYZ	xyz(5.1789, 3.8873, 19.2124)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D317B #7B671D

analogous

#1D607B #1D317B #381D7B

triadic

#1D317B #7B1D31 #317B1D

tetradic

#1D317B #7B1D60 #7B671D #1D7B38

square

#1D317B #7B1D60 #7B671D #1D7B38

split-complementary

#1D317B #7B381D #607B1D

monochromatic

#060A19 #111D49 #1D317B #2945AD #405FD2

Accessibility & contrast

On white

11.81

#1D317B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1D317B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D317B

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D317B	#FFFFFF	#000000	##FFFFFF
##1D317B	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C7D

Deuteranopia (green-blind)

#00337A

Tritanopia (blue-blind)

#004351

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1d317b;
/* rgb */ color: rgb(29, 49, 123);
/* oklch */ color: oklch(34.6% 0.128 267.6);

Tailwind

colors: {
  custom: {
    50: '#6868a2',
    500: '#1d317b',
    950: '#000000',
  },
}

SCSS

$custom: #1d317b;
$custom-light: #6868a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d317b",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 123
  },
  "hsl": {
    "h": 227.234,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.34636,
    "c": 0.12829,
    "h": 267.6
  },
  "luminance": 0.03888
}

Semantic roles & 50–950 ramp

primary

#1D317B

secondary

#AF9845

accent

#C243E5

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D317B

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

Preview Lab → · Contrast checker → · Palette generator →