#1F3D89#1F3D89

#1F3D89 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.132 H 264.6°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D89
RGB	rgb(31, 61, 137)
HSL	hsl(223, 63%, 33%)
HSV	hsv(223, 77%, 54%)
CMYK	cmyk(77.4%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(27.94, 17.65, -45.65)
CIE-LCH	lch(27.94, 48.94, 291.13°)
OKLab	oklab(38.51% -0.0123 -0.1315)
OKLCH	oklch(38.51% 0.132 264.6)
XYZ	xyz(6.7476, 5.4342, 24.3553)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D89 #896B1F

analogous

#1F7289 #1F3D89 #361F89

triadic

#1F3D89 #891F3D #3D891F

tetradic

#1F3D89 #891F72 #896B1F #1F8936

square

#1F3D89 #891F72 #896B1F #1F8936

split-complementary

#1F3D89 #89361F #72891F

monochromatic

#081125 #142757 #1F3D89 #2A53BB #4C73D6

Accessibility & contrast

On white

10.06

#1F3D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1F3D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D89

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D89	#FFFFFF	#000000	##FFFFFF
##1F3D89	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3d89;
/* rgb */ color: rgb(31, 61, 137);
/* oklch */ color: oklch(38.5% 0.132 264.6);

Tailwind

colors: {
  custom: {
    50: '#6b72ac',
    500: '#1f3d89',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d89;
$custom-light: #6b72ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d89",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 223.019,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38509,
    "c": 0.13212,
    "h": 264.6
  },
  "luminance": 0.05435
}

Semantic roles & 50–950 ramp

primary

#1F3D89

secondary

#B99A4B

accent

#B842E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3D89

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

Preview Lab → · Contrast checker → · Palette generator →