#1D309F#1D309F

#1D309F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.9% C 0.179 H 268.1°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#1D309F
RGB	rgb(29, 48, 159)
HSL	hsl(231, 69%, 37%)
HSV	hsv(231, 82%, 62%)
CMYK	cmyk(81.8%, 69.8%, 0%, 37.6%)
CIE-LAB	lab(26.38, 34.78, -61.71)
CIE-LCH	lch(26.38, 70.83, 299.41°)
OKLab	oklab(37.94% -0.006 -0.1788)
OKLCH	oklch(37.94% 0.179 268.1)
XYZ	xyz(7.8195, 4.8774, 33.3235)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D309F #9F8C1D

analogous

#1D719F #1D309F #4B1D9F

triadic

#1D309F #9F1D30 #309F1D

tetradic

#1D309F #9F1D71 #9F8C1D #1D9F4B

square

#1D309F #9F1D71 #9F8C1D #1D9F4B

split-complementary

#1D309F #9F4B1D #719F1D

monochromatic

#0A1137 #14206B #1D309F #2640D3 #566AE0

Accessibility & contrast

On white

10.63

#1D309F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1D309F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D309F

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D309F	#FFFFFF	#000000	##FFFFFF
##1D309F	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A2

Deuteranopia (green-blind)

#00389D

Tritanopia (blue-blind)

#004F63

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d309f;
/* rgb */ color: rgb(29, 48, 159);
/* oklch */ color: oklch(37.9% 0.179 268.1);

Tailwind

colors: {
  custom: {
    50: '#7268bc',
    500: '#1d309f',
    950: '#000000',
  },
}

SCSS

$custom: #1d309f;
$custom-light: #7268bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1d309f",
  "rgb": {
    "r": 29,
    "g": 48,
    "b": 159
  },
  "hsl": {
    "h": 231.231,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.37935,
    "c": 0.17887,
    "h": 268.1
  },
  "luminance": 0.04878
}

Semantic roles & 50–950 ramp

primary

#1D309F

secondary

#C4B354

accent

#D23CEC

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1D309F

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

Preview Lab → · Contrast checker → · Palette generator →