#1F4689#1F4689

#1F4689 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 40.5% C 0.120 H 260.5°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#1F4689
RGB	rgb(31, 70, 137)
HSL	hsl(218, 63%, 33%)
HSV	hsv(218, 77%, 54%)
CMYK	cmyk(77.4%, 48.9%, 0%, 46.3%)
CIE-LAB	lab(30.59, 11.44, -41.38)
CIE-LCH	lch(30.59, 42.93, 285.45°)
OKLab	oklab(40.53% -0.02 -0.1188)
OKLCH	oklch(40.53% 0.12 260.5)
XYZ	xyz(7.2690, 6.4769, 24.5291)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4689 #89621F

analogous

#1F7B89 #1F4689 #2D1F89

triadic

#1F4689 #891F46 #46891F

tetradic

#1F4689 #891F7B #89621F #1F892D

square

#1F4689 #891F7B #89621F #1F892D

split-complementary

#1F4689 #892D1F #7B891F

monochromatic

#081325 #142C57 #1F4689 #2A5FBB #4C7FD6

Accessibility & contrast

On white

9.15

#1F4689 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1F4689 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4689

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4689	#FFFFFF	#000000	##FFFFFF
##1F4689	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214D8B

Deuteranopia (green-blind)

#024388

Tritanopia (blue-blind)

#005661

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f4689;
/* rgb */ color: rgb(31, 70, 137);
/* oklch */ color: oklch(40.5% 0.120 260.5);

Tailwind

colors: {
  custom: {
    50: '#6b78ac',
    500: '#1f4689',
    950: '#000000',
  },
}

SCSS

$custom: #1f4689;
$custom-light: #6b78ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4689",
  "rgb": {
    "r": 31,
    "g": 70,
    "b": 137
  },
  "hsl": {
    "h": 217.925,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.40528,
    "c": 0.12045,
    "h": 260.5
  },
  "luminance": 0.06478
}

Semantic roles & 50–950 ramp

primary

#1F4689

secondary

#B9904B

accent

#AA42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4689

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

Preview Lab → · Contrast checker → · Palette generator →