#1F3488#1F3488

#1F3488 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.5% C 0.142 H 267.8°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#1F3488
RGB	rgb(31, 52, 136)
HSL	hsl(228, 63%, 33%)
HSV	hsv(228, 77%, 53%)
CMYK	cmyk(77.2%, 61.8%, 0%, 46.7%)
CIE-LAB	lab(25.33, 23.49, -49.27)
CIE-LCH	lch(25.33, 54.58, 295.50°)
OKLab	oklab(36.53% -0.0055 -0.1423)
OKLCH	oklch(36.53% 0.142 267.8)
XYZ	xyz(6.2355, 4.5242, 23.8324)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3488 #88731F

analogous

#1F6888 #1F3488 #3E1F88

triadic

#1F3488 #881F34 #34881F

tetradic

#1F3488 #881F68 #88731F #1F883E

square

#1F3488 #881F68 #88731F #1F883E

split-complementary

#1F3488 #883E1F #68881F

monochromatic

#080E24 #142156 #1F3488 #2A47BA #4B67D6

Accessibility & contrast

On white

11.02

#1F3488 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1F3488 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3488

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3488	#FFFFFF	#000000	##FFFFFF
##1F3488	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418B

Deuteranopia (green-blind)

#003786

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f3488;
/* rgb */ color: rgb(31, 52, 136);
/* oklch */ color: oklch(36.5% 0.142 267.8);

Tailwind

colors: {
  custom: {
    50: '#6c6bab',
    500: '#1f3488',
    950: '#000000',
  },
}

SCSS

$custom: #1f3488;
$custom-light: #6c6bab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3488",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 136
  },
  "hsl": {
    "h": 228,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.3653,
    "c": 0.14241,
    "h": 267.8
  },
  "luminance": 0.04525
}

Semantic roles & 50–950 ramp

primary

#1F3488

secondary

#B9A34A

accent

#C542E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F3488

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

Preview Lab → · Contrast checker → · Palette generator →