#1D309D#1D309D

#1D309D is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.7% C 0.176 H 268.1°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#1D309D
RGB	rgb(29, 48, 157)
HSL	hsl(231, 69%, 36%)
HSV	hsv(231, 82%, 62%)
CMYK	cmyk(81.5%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(26.18, 34.03, -60.82)
CIE-LCH	lch(26.18, 69.69, 299.23°)
OKLab	oklab(37.73% -0.0058 -0.1762)
OKLCH	oklch(37.73% 0.176 268.1)
XYZ	xyz(7.6473, 4.8085, 32.4168)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D309D #9D8A1D

analogous

#1D709D #1D309D #4A1D9D

triadic

#1D309D #9D1D30 #309D1D

tetradic

#1D309D #9D1D70 #9D8A1D #1D9D4A

square

#1D309D #9D1D70 #9D8A1D #1D9D4A

split-complementary

#1D309D #9D4A1D #709D1D

monochromatic

#0A1036 #132069 #1D309D #2740D1 #5569E0

Accessibility & contrast

On white

10.70

#1D309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1D309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D309D

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D309D	#FFFFFF	#000000	##FFFFFF
##1D309D	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A0

Deuteranopia (green-blind)

#00389B

Tritanopia (blue-blind)

#004E62

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d309d;
/* rgb */ color: rgb(29, 48, 157);
/* oklch */ color: oklch(37.7% 0.176 268.1);

Tailwind

colors: {
  custom: {
    50: '#7168bb',
    500: '#1d309d',
    950: '#000000',
  },
}

SCSS

$custom: #1d309d;
$custom-light: #7168bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1d309d",
  "rgb": {
    "r": 29,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 231.094,
    "s": 68.817,
    "l": 36.471
  },
  "oklch": {
    "l": 0.37729,
    "c": 0.17628,
    "h": 268.1
  },
  "luminance": 0.04809
}

Semantic roles & 50–950 ramp

primary

#1D309D

secondary

#C3B253

accent

#D23CEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1D309D

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

Preview Lab → · Contrast checker → · Palette generator →