#1F3497#1F3497

#1F3497 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.9% C 0.163 H 268.0°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F3497
RGB	rgb(31, 52, 151)
HSL	hsl(230, 66%, 36%)
HSV	hsv(230, 79%, 59%)
CMYK	cmyk(79.5%, 65.6%, 0%, 40.8%)
CIE-LAB	lab(26.68, 29.31, -56.33)
CIE-LCH	lch(26.68, 63.50, 297.49°)
OKLab	oklab(37.94% -0.0057 -0.163)
OKLCH	oklch(37.94% 0.163 268)
XYZ	xyz(7.3770, 4.9808, 29.8448)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3497 #97821F

analogous

#1F7097 #1F3497 #461F97

triadic

#1F3497 #971F34 #34971F

tetradic

#1F3497 #971F70 #97821F #1F9746

square

#1F3497 #971F70 #97821F #1F9746

split-complementary

#1F3497 #97461F #70971F

monochromatic

#0A1131 #152364 #1F3497 #2945CA #546CDC

Accessibility & contrast

On white

10.52

#1F3497 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F3497 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3497

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3497	#FFFFFF	#000000	##FFFFFF
##1F3497	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459A

Deuteranopia (green-blind)

#003995

Tritanopia (blue-blind)

#004E60

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3497;
/* rgb */ color: rgb(31, 52, 151);
/* oklch */ color: oklch(37.9% 0.163 268.0);

Tailwind

colors: {
  custom: {
    50: '#706bb7',
    500: '#1f3497',
    950: '#000000',
  },
}

SCSS

$custom: #1f3497;
$custom-light: #706bb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3497",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 151
  },
  "hsl": {
    "h": 229.5,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.37941,
    "c": 0.1631,
    "h": 268
  },
  "luminance": 0.04982
}

Semantic roles & 50–950 ramp

primary

#1F3497

secondary

#BFAC52

accent

#CB3FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1F3497

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

Preview Lab → · Contrast checker → · Palette generator →