#1F287A#1F287A

#1F287A is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.9% C 0.138 H 271.5°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F287A
RGB	rgb(31, 40, 122)
HSL	hsl(234, 59%, 30%)
HSV	hsv(234, 75%, 48%)
CMYK	cmyk(74.6%, 67.2%, 0%, 52.2%)
CIE-LAB	lab(20.88, 26.31, -47.73)
CIE-LCH	lch(20.88, 54.50, 298.86°)
OKLab	oklab(32.85% 0.0036 -0.1379)
OKLCH	oklch(32.85% 0.138 271.5)
XYZ	xyz(4.8355, 3.2135, 18.7740)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F287A #7A711F

analogous

#1F557A #1F287A #441F7A

triadic

#1F287A #7A1F28 #287A1F

tetradic

#1F287A #7A1F55 #7A711F #1F7A44

square

#1F287A #7A1F55 #7A711F #1F7A44

split-complementary

#1F287A #7A441F #557A1F

monochromatic

#060818 #131849 #1F287A #2B38AB #4452CF

Accessibility & contrast

On white

12.78

#1F287A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F287A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F287A

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F287A	#FFFFFF	#000000	##FFFFFF
##1F287A	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377D

Deuteranopia (green-blind)

#002E78

Tritanopia (blue-blind)

#003D4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f287a;
/* rgb */ color: rgb(31, 40, 122);
/* oklch */ color: oklch(32.9% 0.138 271.5);

Tailwind

colors: {
  custom: {
    50: '#6962a1',
    500: '#1f287a',
    950: '#000000',
  },
}

SCSS

$custom: #1f287a;
$custom-light: #6962a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f287a",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 122
  },
  "hsl": {
    "h": 234.066,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.3285,
    "c": 0.13798,
    "h": 271.5
  },
  "luminance": 0.03214
}

Semantic roles & 50–950 ramp

primary

#1F287A

secondary

#ADA347

accent

#D345E3

background

#F6F5FA

surface

#ECEAF3

border

#C7C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F287A

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

Preview Lab → · Contrast checker → · Palette generator →