#1F3D91#1F3D91

#1F3D91 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.144 H 265.3°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D91
RGB	rgb(31, 61, 145)
HSL	hsl(224, 65%, 35%)
HSV	hsv(224, 79%, 57%)
CMYK	cmyk(78.6%, 57.9%, 0%, 43.1%)
CIE-LAB	lab(28.57, 20.84, -49.56)
CIE-LCH	lch(28.57, 53.76, 292.80°)
OKLab	oklab(39.19% -0.0118 -0.143)
OKLCH	oklch(39.19% 0.144 265.3)
XYZ	xyz(7.3428, 5.6723, 27.4904)
Luminance	0.0567 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D91 #91731F

analogous

#1F7691 #1F3D91 #3A1F91

triadic

#1F3D91 #911F3D #3D911F

tetradic

#1F3D91 #911F76 #91731F #1F913A

square

#1F3D91 #911F76 #91731F #1F913A

split-complementary

#1F3D91 #913A1F #76911F

monochromatic

#09132C #14285F #1F3D91 #2A52C3 #5175DA

Accessibility & contrast

On white

9.84

#1F3D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1F3D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D91

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D91	#FFFFFF	#000000	##FFFFFF
##1F3D91	1.00	9.84	2.13	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#003E8F

Tritanopia (blue-blind)

#005261

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3d91;
/* rgb */ color: rgb(31, 61, 145);
/* oklch */ color: oklch(39.2% 0.144 265.3);

Tailwind

colors: {
  custom: {
    50: '#6d72b2',
    500: '#1f3d91',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d91;
$custom-light: #6d72b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d91",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 145
  },
  "hsl": {
    "h": 224.211,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.39186,
    "c": 0.14351,
    "h": 265.3
  },
  "luminance": 0.05673
}

Semantic roles & 50–950 ramp

primary

#1F3D91

secondary

#BDA04F

accent

#BC40E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3D91

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

Preview Lab → · Contrast checker → · Palette generator →