#1F3CA8#1F3CA8

#1F3CA8 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.176 H 266.5°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F3CA8
RGB	rgb(31, 60, 168)
HSL	hsl(227, 69%, 39%)
HSV	hsv(227, 82%, 66%)
CMYK	cmyk(81.5%, 64.3%, 0%, 34.1%)
CIE-LAB	lab(30.28, 30.49, -60.75)
CIE-LCH	lch(30.28, 67.97, 296.65°)
OKLab	oklab(41.07% -0.0108 -0.1758)
OKLCH	oklch(41.07% 0.176 266.5)
XYZ	xyz(9.2463, 6.3491, 37.7764)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3CA8 #A88B1F

analogous

#1F81A8 #1F3CA8 #471FA8

triadic

#1F3CA8 #A81F3C #3CA81F

tetradic

#1F3CA8 #A81F81 #A88B1F #1FA847

square

#1F3CA8 #A81F81 #A88B1F #1FA847

split-complementary

#1F3CA8 #A8471F #81A81F

monochromatic

#0C1741 #152A74 #1F3CA8 #2C51D8 #607BE2

Accessibility & contrast

On white

9.25

#1F3CA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F3CA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3CA8

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3CA8	#FFFFFF	#000000	##FFFFFF
##1F3CA8	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0041A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f3ca8;
/* rgb */ color: rgb(31, 60, 168);
/* oklch */ color: oklch(41.1% 0.176 266.5);

Tailwind

colors: {
  custom: {
    50: '#7371c3',
    500: '#1f3ca8',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ca8;
$custom-light: #7371c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ca8",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 168
  },
  "hsl": {
    "h": 227.299,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.41069,
    "c": 0.17618,
    "h": 266.5
  },
  "luminance": 0.0635
}

Semantic roles & 50–950 ramp

primary

#1F3CA8

secondary

#C6B05D

accent

#C73CEC

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1F3CA8

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

Preview Lab → · Contrast checker → · Palette generator →