#1F3B9E#1F3B9E

#1F3B9E is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.164 H 266.5°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3B9E
RGB	rgb(31, 59, 158)
HSL	hsl(227, 67%, 37%)
HSV	hsv(227, 80%, 62%)
CMYK	cmyk(80.4%, 62.7%, 0%, 38%)
CIE-LAB	lab(29.13, 27.31, -56.59)
CIE-LCH	lch(29.13, 62.84, 295.76°)
OKLab	oklab(39.94% -0.0101 -0.1637)
OKLCH	oklch(39.94% 0.164 266.5)
XYZ	xyz(8.2984, 5.8869, 33.0400)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3B9E #9E821F

analogous

#1F7A9E #1F3B9E #431F9E

triadic

#1F3B9E #9E1F3B #3B9E1F

tetradic

#1F3B9E #9E1F7A #9E821F #1F9E43

square

#1F3B9E #9E1F7A #9E821F #1F9E43

split-complementary

#1F3B9E #9E431F #7A9E1F

monochromatic

#0B1538 #15286B #1F3B9E #294ED1 #5976DE

Accessibility & contrast

On white

9.64

#1F3B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F3B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3B9E

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3B9E	#FFFFFF	#000000	##FFFFFF
##1F3B9E	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA1

Deuteranopia (green-blind)

#003F9C

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3b9e;
/* rgb */ color: rgb(31, 59, 158);
/* oklch */ color: oklch(39.9% 0.164 266.5);

Tailwind

colors: {
  custom: {
    50: '#7170bc',
    500: '#1f3b9e',
    950: '#000000',
  },
}

SCSS

$custom: #1f3b9e;
$custom-light: #7170bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3b9e",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 158
  },
  "hsl": {
    "h": 226.772,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39942,
    "c": 0.16401,
    "h": 266.5
  },
  "luminance": 0.05888
}

Semantic roles & 50–950 ramp

primary

#1F3B9E

secondary

#C2AB56

accent

#C43EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3B9E

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

Preview Lab → · Contrast checker → · Palette generator →