#1F3E8E#1F3E8E

#1F3E8E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.1% C 0.138 H 264.7°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E8E
RGB	rgb(31, 62, 142)
HSL	hsl(223, 64%, 34%)
HSV	hsv(223, 78%, 56%)
CMYK	cmyk(78.2%, 56.3%, 0%, 44.3%)
CIE-LAB	lab(28.61, 18.95, -47.65)
CIE-LCH	lch(28.61, 51.28, 291.69°)
OKLab	oklab(39.14% -0.0127 -0.1374)
OKLCH	oklch(39.14% 0.138 264.7)
XYZ	xyz(7.1685, 5.6887, 26.3062)
Luminance	0.0569 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E8E #8E6F1F

analogous

#1F768E #1F3E8E #381F8E

triadic

#1F3E8E #8E1F3E #3E8E1F

tetradic

#1F3E8E #8E1F76 #8E6F1F #1F8E38

square

#1F3E8E #8E1F76 #8E6F1F #1F8E38

split-complementary

#1F3E8E #8E381F #768E1F

monochromatic

#09122A #14285C #1F3E8E #2A54C0 #4F75D9

Accessibility & contrast

On white

9.82

#1F3E8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1F3E8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E8E

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E8E	#FFFFFF	#000000	##FFFFFF
##1F3E8E	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3e8e;
/* rgb */ color: rgb(31, 62, 142);
/* oklch */ color: oklch(39.1% 0.138 264.7);

Tailwind

colors: {
  custom: {
    50: '#6c72b0',
    500: '#1f3e8e',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e8e;
$custom-light: #6c72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e8e",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 142
  },
  "hsl": {
    "h": 223.243,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.39143,
    "c": 0.13797,
    "h": 264.7
  },
  "luminance": 0.0569
}

Semantic roles & 50–950 ramp

primary

#1F3E8E

secondary

#BB9D4D

accent

#B941E7

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1F3E8E

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

Preview Lab → · Contrast checker → · Palette generator →