#1F2788#1F2788

#1F2788 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.1% C 0.158 H 271.0°. Best body text is #FFFFFF at 12.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F2788
RGB	rgb(31, 39, 136)
HSL	hsl(235, 63%, 33%)
HSV	hsv(235, 77%, 53%)
CMYK	cmyk(77.2%, 71.3%, 0%, 46.7%)
CIE-LAB	lab(22.01, 32.23, -54.71)
CIE-LCH	lch(22.01, 63.50, 300.51°)
OKLab	oklab(34.1% 0.0029 -0.1583)
OKLCH	oklch(34.1% 0.158 271)
XYZ	xyz(5.7330, 3.5193, 23.6649)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2788 #88801F

analogous

#1F5B88 #1F2788 #4C1F88

triadic

#1F2788 #881F27 #27881F

tetradic

#1F2788 #881F5B #88801F #1F884C

square

#1F2788 #881F5B #88801F #1F884C

split-complementary

#1F2788 #884C1F #5B881F

monochromatic

#080A24 #141956 #1F2788 #2A35BA #4B56D6

Accessibility & contrast

On white

12.32

#1F2788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F2788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2788

12.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2788	#FFFFFF	#000000	##FFFFFF
##1F2788	1.00	12.32	1.70	12.32
#FFFFFF	12.32	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8B

Deuteranopia (green-blind)

#003086

Tritanopia (blue-blind)

#004254

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f2788;
/* rgb */ color: rgb(31, 39, 136);
/* oklch */ color: oklch(34.1% 0.158 271.0);

Tailwind

colors: {
  custom: {
    50: '#6d61ac',
    500: '#1f2788',
    950: '#000000',
  },
}

SCSS

$custom: #1f2788;
$custom-light: #6d61ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2788",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 136
  },
  "hsl": {
    "h": 235.429,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.34095,
    "c": 0.15835,
    "h": 271
  },
  "luminance": 0.0352
}

Semantic roles & 50–950 ramp

primary

#1F2788

secondary

#B9B04A

accent

#D942E6

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2788

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

Preview Lab → · Contrast checker → · Palette generator →