#1D309A#1D309A

#1D309A is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.4% C 0.172 H 268.1°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#1D309A
RGB	rgb(29, 48, 154)
HSL	hsl(231, 68%, 36%)
HSV	hsv(231, 81%, 60%)
CMYK	cmyk(81.2%, 68.8%, 0%, 39.6%)
CIE-LAB	lab(25.88, 32.91, -59.48)
CIE-LCH	lch(25.88, 67.98, 298.96°)
OKLab	oklab(37.42% -0.0056 -0.1723)
OKLCH	oklch(37.42% 0.172 268.1)
XYZ	xyz(7.3944, 4.7073, 31.0845)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D309A #9A871D

analogous

#1D6E9A #1D309A #481D9A

triadic

#1D309A #9A1D30 #309A1D

tetradic

#1D309A #9A1D6E #9A871D #1D9A48

square

#1D309A #9A1D6E #9A871D #1D9A48

split-complementary

#1D309A #9A481D #6E9A1D

monochromatic

#0A1033 #132066 #1D309A #2740CE #5368DF

Accessibility & contrast

On white

10.82

#1D309A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1D309A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D309A

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D309A	#FFFFFF	#000000	##FFFFFF
##1D309A	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00439D

Deuteranopia (green-blind)

#003798

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d309a;
/* rgb */ color: rgb(29, 48, 154);
/* oklch */ color: oklch(37.4% 0.172 268.1);

Tailwind

colors: {
  custom: {
    50: '#7068b9',
    500: '#1d309a',
    950: '#000000',
  },
}

SCSS

$custom: #1d309a;
$custom-light: #7068b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d309a",
  "rgb": {
    "r": 29,
    "g": 48,
    "b": 154
  },
  "hsl": {
    "h": 230.88,
    "s": 68.306,
    "l": 35.882
  },
  "oklch": {
    "l": 0.37422,
    "c": 0.17235,
    "h": 268.1
  },
  "luminance": 0.04708
}

Semantic roles & 50–950 ramp

primary

#1D309A

secondary

#C2B151

accent

#D13DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1D309A

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

Preview Lab → · Contrast checker → · Palette generator →