#1D3F9C#1D3F9C

#1D3F9C is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.157 H 264.8°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F9C
RGB	rgb(29, 63, 156)
HSL	hsl(224, 69%, 36%)
HSV	hsv(224, 81%, 61%)
CMYK	cmyk(81.4%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(29.95, 23.62, -54.04)
CIE-LCH	lch(29.95, 58.97, 293.61°)
OKLab	oklab(40.48% -0.0142 -0.1562)
OKLCH	oklch(40.48% 0.157 264.8)
XYZ	xyz(8.2828, 6.2155, 32.2092)
Luminance	0.0622 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F9C #9C7A1D

analogous

#1D7F9C #1D3F9C #3B1D9C

triadic

#1D3F9C #9C1D3F #3F9C1D

tetradic

#1D3F9C #9C1D7F #9C7A1D #1D9C3B

square

#1D3F9C #9C1D7F #9C7A1D #1D9C3B

split-complementary

#1D3F9C #9C3B1D #7F9C1D

monochromatic

#0A1535 #132A68 #1D3F9C #2754D0 #5479DF

Accessibility & contrast

On white

9.36

#1D3F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1D3F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F9C

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F9C	#FFFFFF	#000000	##FFFFFF
##1D3F9C	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00419A

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1d3f9c;
/* rgb */ color: rgb(29, 63, 156);
/* oklch */ color: oklch(40.5% 0.157 264.8);

Tailwind

colors: {
  custom: {
    50: '#6f73ba',
    500: '#1d3f9c',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f9c;
$custom-light: #6f73ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f9c",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 223.937,
    "s": 68.649,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40482,
    "c": 0.15682,
    "h": 264.8
  },
  "luminance": 0.06217
}

Semantic roles & 50–950 ramp

primary

#1D3F9C

secondary

#C2A452

accent

#BD3CEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D3F9C

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

Preview Lab → · Contrast checker → · Palette generator →