#1F4688#1F4688

#1F4688 is a dark, moderate blue. Relative luminance 0.064; OKLCH L 40.5% C 0.119 H 260.3°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F4688
RGB	rgb(31, 70, 136)
HSL	hsl(218, 63%, 33%)
HSV	hsv(218, 77%, 53%)
CMYK	cmyk(77.2%, 48.5%, 0%, 46.7%)
CIE-LAB	lab(30.52, 11.03, -40.87)
CIE-LCH	lch(30.52, 42.33, 285.11°)
OKLab	oklab(40.45% -0.0201 -0.1173)
OKLCH	oklch(40.45% 0.119 260.3)
XYZ	xyz(7.1976, 6.4484, 24.1531)
Luminance	0.0645 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4688 #88611F

analogous

#1F7A88 #1F4688 #2C1F88

triadic

#1F4688 #881F46 #46881F

tetradic

#1F4688 #881F7A #88611F #1F882C

square

#1F4688 #881F7A #88611F #1F882C

split-complementary

#1F4688 #882C1F #7A881F

monochromatic

#081324 #142C56 #1F4688 #2A60BA #4B7FD6

Accessibility & contrast

On white

9.17

#1F4688 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1F4688 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4688

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4688	#FFFFFF	#000000	##FFFFFF
##1F4688	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224D8A

Deuteranopia (green-blind)

#054387

Tritanopia (blue-blind)

#005660

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f4688;
/* rgb */ color: rgb(31, 70, 136);
/* oklch */ color: oklch(40.5% 0.119 260.3);

Tailwind

colors: {
  custom: {
    50: '#6b78ab',
    500: '#1f4688',
    950: '#000000',
  },
}

SCSS

$custom: #1f4688;
$custom-light: #6b78ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4688",
  "rgb": {
    "r": 31,
    "g": 70,
    "b": 136
  },
  "hsl": {
    "h": 217.714,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.40453,
    "c": 0.11901,
    "h": 260.3
  },
  "luminance": 0.06449
}

Semantic roles & 50–950 ramp

primary

#1F4688

secondary

#B9904A

accent

#A942E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1F4688

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

Preview Lab → · Contrast checker → · Palette generator →