#1F3AA0#1F3AA0

#1F3AA0 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.168 H 266.8°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F3AA0
RGB	rgb(31, 58, 160)
HSL	hsl(227, 68%, 37%)
HSV	hsv(227, 81%, 63%)
CMYK	cmyk(80.6%, 63.8%, 0%, 37.3%)
CIE-LAB	lab(29.04, 28.75, -57.94)
CIE-LCH	lch(29.04, 64.69, 296.39°)
OKLab	oklab(39.93% -0.0095 -0.1677)
OKLCH	oklch(39.93% 0.168 266.8)
XYZ	xyz(8.4211, 5.8545, 33.9371)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3AA0 #A0851F

analogous

#1F7AA0 #1F3AA0 #451FA0

triadic

#1F3AA0 #A01F3A #3AA01F

tetradic

#1F3AA0 #A01F7A #A0851F #1FA045

square

#1F3AA0 #A01F7A #A0851F #1FA045

split-complementary

#1F3AA0 #A0451F #7AA01F

monochromatic

#0B1539 #15276D #1F3AA0 #294DD3 #5A76DF

Accessibility & contrast

On white

9.67

#1F3AA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1F3AA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3AA0

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3AA0	#FFFFFF	#000000	##FFFFFF
##1F3AA0	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA3

Deuteranopia (green-blind)

#003F9E

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f3aa0;
/* rgb */ color: rgb(31, 58, 160);
/* oklch */ color: oklch(39.9% 0.168 266.8);

Tailwind

colors: {
  custom: {
    50: '#7170bd',
    500: '#1f3aa0',
    950: '#000000',
  },
}

SCSS

$custom: #1f3aa0;
$custom-light: #7170bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3aa0",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 160
  },
  "hsl": {
    "h": 227.442,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39935,
    "c": 0.16793,
    "h": 266.8
  },
  "luminance": 0.05855
}

Semantic roles & 50–950 ramp

primary

#1F3AA0

secondary

#C3AD58

accent

#C63DEA

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3AA0

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

Preview Lab → · Contrast checker → · Palette generator →