#1F2379#1F2379

#1F2379 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.143 H 272.9°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F2379
RGB	rgb(31, 35, 121)
HSL	hsl(237, 59%, 30%)
HSV	hsv(237, 74%, 47%)
CMYK	cmyk(74.4%, 71.1%, 0%, 52.5%)
CIE-LAB	lab(19.53, 29.28, -49.31)
CIE-LCH	lch(19.53, 57.35, 300.70°)
OKLab	oklab(31.84% 0.0071 -0.1426)
OKLCH	oklch(31.84% 0.143 272.9)
XYZ	xyz(4.6161, 2.8734, 18.3968)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2379 #79751F

analogous

#1F5079 #1F2379 #481F79

triadic

#1F2379 #791F23 #23791F

tetradic

#1F2379 #791F50 #79751F #1F7948

square

#1F2379 #791F50 #79751F #1F7948

split-complementary

#1F2379 #79481F #50791F

monochromatic

#060718 #131548 #1F2379 #2B31AA #434ACF

Accessibility & contrast

On white

13.34

#1F2379 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F2379 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2379

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2379	#FFFFFF	#000000	##FFFFFF
##1F2379	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347C

Deuteranopia (green-blind)

#002B77

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f2379;
/* rgb */ color: rgb(31, 35, 121);
/* oklch */ color: oklch(31.8% 0.143 272.9);

Tailwind

colors: {
  custom: {
    50: '#695ea1',
    500: '#1f2379',
    950: '#000000',
  },
}

SCSS

$custom: #1f2379;
$custom-light: #695ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2379",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 121
  },
  "hsl": {
    "h": 237.333,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31838,
    "c": 0.14274,
    "h": 272.9
  },
  "luminance": 0.02874
}

Semantic roles & 50–950 ramp

primary

#1F2379

secondary

#ACA847

accent

#DB45E2

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F2379

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

Preview Lab → · Contrast checker → · Palette generator →