#1F379D#1F379D

#1F379D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.1% C 0.168 H 267.4°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1F379D
RGB	rgb(31, 55, 157)
HSL	hsl(229, 67%, 37%)
HSV	hsv(229, 80%, 62%)
CMYK	cmyk(80.3%, 65%, 0%, 38.4%)
CIE-LAB	lab(28.00, 29.61, -57.83)
CIE-LCH	lch(28.00, 64.97, 297.11°)
OKLab	oklab(39.08% -0.0077 -0.1674)
OKLCH	oklch(39.08% 0.168 267.4)
XYZ	xyz(8.0149, 5.4571, 32.5227)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F379D #9D851F

analogous

#1F769D #1F379D #461F9D

triadic

#1F379D #9D1F37 #379D1F

tetradic

#1F379D #9D1F76 #9D851F #1F9D46

square

#1F379D #9D1F76 #9D851F #1F9D46

split-complementary

#1F379D #9D461F #769D1F

monochromatic

#0B1337 #15256A #1F379D #2949D0 #5872DE

Accessibility & contrast

On white

10.04

#1F379D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1F379D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F379D

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F379D	#FFFFFF	#000000	##FFFFFF
##1F379D	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A0

Deuteranopia (green-blind)

#003C9B

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f379d;
/* rgb */ color: rgb(31, 55, 157);
/* oklch */ color: oklch(39.1% 0.168 267.4);

Tailwind

colors: {
  custom: {
    50: '#716dbb',
    500: '#1f379d',
    950: '#000000',
  },
}

SCSS

$custom: #1f379d;
$custom-light: #716dbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f379d",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 157
  },
  "hsl": {
    "h": 228.571,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39082,
    "c": 0.16755,
    "h": 267.4
  },
  "luminance": 0.05458
}

Semantic roles & 50–950 ramp

primary

#1F379D

secondary

#C2AD56

accent

#C93EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F379D

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

Preview Lab → · Contrast checker → · Palette generator →