#1F3AA1#1F3AA1

#1F3AA1 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.169 H 266.8°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3AA1
RGB	rgb(31, 58, 161)
HSL	hsl(228, 68%, 38%)
HSV	hsv(228, 81%, 63%)
CMYK	cmyk(80.7%, 64%, 0%, 36.9%)
CIE-LAB	lab(29.13, 29.14, -58.40)
CIE-LCH	lch(29.13, 65.27, 296.52°)
OKLab	oklab(40.03% -0.0095 -0.169)
OKLCH	oklch(40.03% 0.169 266.8)
XYZ	xyz(8.5089, 5.8896, 34.3997)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3AA1 #A1861F

analogous

#1F7BA1 #1F3AA1 #451FA1

triadic

#1F3AA1 #A11F3A #3AA11F

tetradic

#1F3AA1 #A11F7B #A1861F #1FA145

square

#1F3AA1 #A11F7B #A1861F #1FA145

split-complementary

#1F3AA1 #A1451F #7BA11F

monochromatic

#0B153A #15286E #1F3AA1 #294CD4 #5B76DF

Accessibility & contrast

On white

9.64

#1F3AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F3AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3AA1

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3AA1	#FFFFFF	#000000	##FFFFFF
##1F3AA1	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3aa1;
/* rgb */ color: rgb(31, 58, 161);
/* oklch */ color: oklch(40.0% 0.169 266.8);

Tailwind

colors: {
  custom: {
    50: '#7270be',
    500: '#1f3aa1',
    950: '#000000',
  },
}

SCSS

$custom: #1f3aa1;
$custom-light: #7270be;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3aa1",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 161
  },
  "hsl": {
    "h": 227.538,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.4003,
    "c": 0.16928,
    "h": 266.8
  },
  "luminance": 0.05891
}

Semantic roles & 50–950 ramp

primary

#1F3AA1

secondary

#C4AD58

accent

#C73DEB

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3AA1

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

Preview Lab → · Contrast checker → · Palette generator →