#1F3589#1F3589

#1F3589 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.8% C 0.143 H 267.5°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F3589
RGB	rgb(31, 53, 137)
HSL	hsl(228, 63%, 33%)
HSV	hsv(228, 77%, 54%)
CMYK	cmyk(77.4%, 61.3%, 0%, 46.3%)
CIE-LAB	lab(25.69, 23.20, -49.30)
CIE-LCH	lch(25.69, 54.49, 295.20°)
OKLab	oklab(36.82% -0.0062 -0.1424)
OKLCH	oklch(36.82% 0.143 267.5)
XYZ	xyz(6.3520, 4.6430, 24.2235)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3589 #89731F

analogous

#1F6A89 #1F3589 #3E1F89

triadic

#1F3589 #891F35 #35891F

tetradic

#1F3589 #891F6A #89731F #1F893E

square

#1F3589 #891F6A #89731F #1F893E

split-complementary

#1F3589 #893E1F #6A891F

monochromatic

#080E25 #142257 #1F3589 #2A48BB #4C69D6

Accessibility & contrast

On white

10.89

#1F3589 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F3589 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3589

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3589	#FFFFFF	#000000	##FFFFFF
##1F3589	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428C

Deuteranopia (green-blind)

#003887

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f3589;
/* rgb */ color: rgb(31, 53, 137);
/* oklch */ color: oklch(36.8% 0.143 267.5);

Tailwind

colors: {
  custom: {
    50: '#6c6bac',
    500: '#1f3589',
    950: '#000000',
  },
}

SCSS

$custom: #1f3589;
$custom-light: #6c6bac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3589",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 137
  },
  "hsl": {
    "h": 227.547,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36824,
    "c": 0.14253,
    "h": 267.5
  },
  "luminance": 0.04644
}

Semantic roles & 50–950 ramp

primary

#1F3589

secondary

#B9A24B

accent

#C442E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F3589

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

Preview Lab → · Contrast checker → · Palette generator →