#1F3E8F#1F3E8F

#1F3E8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.139 H 264.8°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E8F
RGB	rgb(31, 62, 143)
HSL	hsl(223, 64%, 34%)
HSV	hsv(223, 78%, 56%)
CMYK	cmyk(78.3%, 56.6%, 0%, 43.9%)
CIE-LAB	lab(28.69, 19.35, -48.13)
CIE-LCH	lch(28.69, 51.88, 291.90°)
OKLab	oklab(39.23% -0.0126 -0.1388)
OKLCH	oklch(39.23% 0.139 264.8)
XYZ	xyz(7.2439, 5.7189, 26.7034)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E8F #8F701F

analogous

#1F768F #1F3E8F #381F8F

triadic

#1F3E8F #8F1F3E #3E8F1F

tetradic

#1F3E8F #8F1F76 #8F701F #1F8F38

square

#1F3E8F #8F1F76 #8F701F #1F8F38

split-complementary

#1F3E8F #8F381F #768F1F

monochromatic

#09122A #14285D #1F3E8F #2A54C1 #4F76D9

Accessibility & contrast

On white

9.79

#1F3E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1F3E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E8F

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E8F	#FFFFFF	#000000	##FFFFFF
##1F3E8F	1.00	9.79	2.14	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f3e8f;
/* rgb */ color: rgb(31, 62, 143);
/* oklch */ color: oklch(39.2% 0.139 264.8);

Tailwind

colors: {
  custom: {
    50: '#6d72b0',
    500: '#1f3e8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e8f;
$custom-light: #6d72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e8f",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 143
  },
  "hsl": {
    "h": 223.393,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.39227,
    "c": 0.13939,
    "h": 264.8
  },
  "luminance": 0.0572
}

Semantic roles & 50–950 ramp

primary

#1F3E8F

secondary

#BC9D4E

accent

#B940E7

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F3E8F

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

Preview Lab → · Contrast checker → · Palette generator →