#1F2789#1F2789

#1F2789 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.2% C 0.160 H 271.0°. Best body text is #FFFFFF at 12.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F2789
RGB	rgb(31, 39, 137)
HSL	hsl(235, 63%, 33%)
HSV	hsv(235, 77%, 54%)
CMYK	cmyk(77.4%, 71.5%, 0%, 46.3%)
CIE-LAB	lab(22.12, 32.60, -55.16)
CIE-LCH	lch(22.12, 64.08, 300.58°)
OKLab	oklab(34.2% 0.0027 -0.1596)
OKLCH	oklch(34.2% 0.16 271)
XYZ	xyz(5.8044, 3.5479, 24.0410)
Luminance	0.0355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2789 #89811F

analogous

#1F5C89 #1F2789 #4C1F89

triadic

#1F2789 #891F27 #27891F

tetradic

#1F2789 #891F5C #89811F #1F894C

square

#1F2789 #891F5C #89811F #1F894C

split-complementary

#1F2789 #894C1F #5C891F

monochromatic

#080B25 #141957 #1F2789 #2A35BB #4C56D6

Accessibility & contrast

On white

12.28

#1F2789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F2789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2789

12.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2789	#FFFFFF	#000000	##FFFFFF
##1F2789	1.00	12.28	1.71	12.28
#FFFFFF	12.28	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8C

Deuteranopia (green-blind)

#003087

Tritanopia (blue-blind)

#004255

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f2789;
/* rgb */ color: rgb(31, 39, 137);
/* oklch */ color: oklch(34.2% 0.160 271.0);

Tailwind

colors: {
  custom: {
    50: '#6d61ac',
    500: '#1f2789',
    950: '#000000',
  },
}

SCSS

$custom: #1f2789;
$custom-light: #6d61ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2789",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 137
  },
  "hsl": {
    "h": 235.472,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.342,
    "c": 0.15967,
    "h": 271
  },
  "luminance": 0.03548
}

Semantic roles & 50–950 ramp

primary

#1F2789

secondary

#B9B14B

accent

#DA42E6

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2789

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

Preview Lab → · Contrast checker → · Palette generator →