#1F2879#1F2879

#1F2879 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.137 H 271.5°. Best body text is #FFFFFF at 12.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F2879
RGB	rgb(31, 40, 121)
HSL	hsl(234, 59%, 30%)
HSV	hsv(234, 74%, 47%)
CMYK	cmyk(74.4%, 66.9%, 0%, 52.5%)
CIE-LAB	lab(20.79, 25.92, -47.25)
CIE-LCH	lch(20.79, 53.89, 298.75°)
OKLab	oklab(32.75% 0.0036 -0.1365)
OKLCH	oklch(32.75% 0.137 271.5)
XYZ	xyz(4.7739, 3.1889, 18.4494)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2879 #79701F

analogous

#1F5579 #1F2879 #431F79

triadic

#1F2879 #791F28 #28791F

tetradic

#1F2879 #791F55 #79701F #1F7943

square

#1F2879 #791F55 #79701F #1F7943

split-complementary

#1F2879 #79431F #55791F

monochromatic

#060818 #131848 #1F2879 #2B38AA #4351CF

Accessibility & contrast

On white

12.82

#1F2879 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F2879 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2879

12.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2879	#FFFFFF	#000000	##FFFFFF
##1F2879	1.00	12.82	1.64	12.82
#FFFFFF	12.82	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367C

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2879;
/* rgb */ color: rgb(31, 40, 121);
/* oklch */ color: oklch(32.8% 0.137 271.5);

Tailwind

colors: {
  custom: {
    50: '#6962a1',
    500: '#1f2879',
    950: '#000000',
  },
}

SCSS

$custom: #1f2879;
$custom-light: #6962a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2879",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 121
  },
  "hsl": {
    "h": 234,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32752,
    "c": 0.13656,
    "h": 271.5
  },
  "luminance": 0.03189
}

Semantic roles & 50–950 ramp

primary

#1F2879

secondary

#ACA247

accent

#D345E2

background

#F6F5FA

surface

#ECEAF3

border

#C7C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F2879

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

Preview Lab → · Contrast checker → · Palette generator →