#1F1789#1F1789

#1F1789 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.9% C 0.176 H 273.2°. Best body text is #FFFFFF at 13.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F1789
RGB	rgb(31, 23, 137)
HSL	hsl(244, 71%, 31%)
HSV	hsv(244, 83%, 54%)
CMYK	cmyk(77.4%, 83.2%, 0%, 46.3%)
CIE-LAB	lab(18.84, 41.86, -60.58)
CIE-LCH	lch(18.84, 73.63, 304.65°)
OKLab	oklab(31.88% 0.0097 -0.1752)
OKLCH	oklch(31.88% 0.176 273.2)
XYZ	xyz(5.3853, 2.7097, 23.9013)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1789 #818917

analogous

#174889 #1F1789 #581789

triadic

#1F1789 #891F17 #17891F

tetradic

#1F1789 #891748 #818917 #178958

square

#1F1789 #891748 #818917 #178958

split-complementary

#1F1789 #895817 #488917

monochromatic

#070520 #130E55 #1F1789 #2B20BD #483CDE

Accessibility & contrast

On white

13.62

#1F1789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F1789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1789

13.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1789	#FFFFFF	#000000	##FFFFFF
##1F1789	1.00	13.62	1.54	13.62
#FFFFFF	13.62	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338C

Deuteranopia (green-blind)

#002887

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f1789;
/* rgb */ color: rgb(31, 23, 137);
/* oklch */ color: oklch(31.9% 0.176 273.2);

Tailwind

colors: {
  custom: {
    50: '#6f58ad',
    500: '#1f1789',
    950: '#000000',
  },
}

SCSS

$custom: #1f1789;
$custom-light: #6f58ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1789",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 137
  },
  "hsl": {
    "h": 244.211,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31881,
    "c": 0.17551,
    "h": 273.2
  },
  "luminance": 0.0271
}

Semantic roles & 50–950 ramp

primary

#1F1789

secondary

#B4BD3F

accent

#EE3AE1

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F1789

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

Preview Lab → · Contrast checker → · Palette generator →