#1F2389#1F2389

#1F2389 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.5% C 0.164 H 271.7°. Best body text is #FFFFFF at 12.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F2389
RGB	rgb(31, 35, 137)
HSL	hsl(238, 63%, 33%)
HSV	hsv(238, 77%, 54%)
CMYK	cmyk(77.4%, 74.5%, 0%, 46.3%)
CIE-LAB	lab(21.20, 35.12, -56.67)
CIE-LCH	lch(21.20, 66.67, 301.79°)
OKLab	oklab(33.55% 0.0048 -0.164)
OKLCH	oklch(33.55% 0.164 271.7)
XYZ	xyz(5.6799, 3.2989, 23.9995)
Luminance	0.0330 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2389 #89851F

analogous

#1F5889 #1F2389 #501F89

triadic

#1F2389 #891F23 #23891F

tetradic

#1F2389 #891F58 #89851F #1F8950

square

#1F2389 #891F58 #89851F #1F8950

split-complementary

#1F2389 #89501F #58891F

monochromatic

#080925 #141657 #1F2389 #2A30BB #4C51D6

Accessibility & contrast

On white

12.65

#1F2389 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1F2389 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2389

12.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2389	#FFFFFF	#000000	##FFFFFF
##1F2389	1.00	12.65	1.66	12.65
#FFFFFF	12.65	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388C

Deuteranopia (green-blind)

#002E87

Tritanopia (blue-blind)

#004054

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f2389;
/* rgb */ color: rgb(31, 35, 137);
/* oklch */ color: oklch(33.5% 0.164 271.7);

Tailwind

colors: {
  custom: {
    50: '#6e5fad',
    500: '#1f2389',
    950: '#000000',
  },
}

SCSS

$custom: #1f2389;
$custom-light: #6e5fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2389",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 137
  },
  "hsl": {
    "h": 237.736,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33545,
    "c": 0.1641,
    "h": 271.7
  },
  "luminance": 0.033
}

Semantic roles & 50–950 ramp

primary

#1F2389

secondary

#B9B54B

accent

#E042E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F2389

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

Preview Lab → · Contrast checker → · Palette generator →