#1F4589#1F4589

#1F4589 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.3% C 0.122 H 261.0°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F4589
RGB	rgb(31, 69, 137)
HSL	hsl(218, 63%, 33%)
HSV	hsv(218, 77%, 54%)
CMYK	cmyk(77.4%, 49.6%, 0%, 46.3%)
CIE-LAB	lab(30.29, 12.12, -41.86)
CIE-LCH	lch(30.29, 43.58, 286.15°)
OKLab	oklab(40.3% -0.0191 -0.1202)
OKLCH	oklch(40.3% 0.122 261)
XYZ	xyz(7.2069, 6.3529, 24.5085)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4589 #89631F

analogous

#1F7A89 #1F4589 #2E1F89

triadic

#1F4589 #891F45 #45891F

tetradic

#1F4589 #891F7A #89631F #1F892E

square

#1F4589 #891F7A #89631F #1F892E

split-complementary

#1F4589 #892E1F #7A891F

monochromatic

#081325 #142C57 #1F4589 #2A5EBB #4C7ED6

Accessibility & contrast

On white

9.25

#1F4589 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F4589 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4589

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4589	#FFFFFF	#000000	##FFFFFF
##1F4589	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4C8C

Deuteranopia (green-blind)

#004388

Tritanopia (blue-blind)

#005560

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4589;
/* rgb */ color: rgb(31, 69, 137);
/* oklch */ color: oklch(40.3% 0.122 261.0);

Tailwind

colors: {
  custom: {
    50: '#6b78ac',
    500: '#1f4589',
    950: '#000000',
  },
}

SCSS

$custom: #1f4589;
$custom-light: #6b78ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4589",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 137
  },
  "hsl": {
    "h": 218.491,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.40298,
    "c": 0.12173,
    "h": 261
  },
  "luminance": 0.06354
}

Semantic roles & 50–950 ramp

primary

#1F4589

secondary

#B9924B

accent

#AB42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F4589

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

Preview Lab → · Contrast checker → · Palette generator →