#1F3E79#1F3E79

#1F3E79 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.107 H 261.8°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E79
RGB	rgb(31, 62, 121)
HSL	hsl(219, 59%, 30%)
HSV	hsv(219, 74%, 47%)
CMYK	cmyk(74.4%, 48.8%, 0%, 52.5%)
CIE-LAB	lab(27.06, 10.52, -37.06)
CIE-LCH	lch(27.06, 38.53, 285.85°)
OKLab	oklab(37.47% -0.0153 -0.1062)
OKLCH	oklch(37.47% 0.107 261.8)
XYZ	xyz(5.7377, 5.1164, 18.7706)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E79 #795A1F

analogous

#1F6B79 #1F3E79 #2D1F79

triadic

#1F3E79 #791F3E #3E791F

tetradic

#1F3E79 #791F6B #795A1F #1F792D

square

#1F3E79 #791F6B #795A1F #1F792D

split-complementary

#1F3E79 #792D1F #6B791F

monochromatic

#060C18 #132548 #1F3E79 #2B57AA #4374CF

Accessibility & contrast

On white

10.38

#1F3E79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1F3E79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E79

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E79	#FFFFFF	#000000	##FFFFFF
##1F3E79	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F447B

Deuteranopia (green-blind)

#0A3C78

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3e79;
/* rgb */ color: rgb(31, 62, 121);
/* oklch */ color: oklch(37.5% 0.107 261.8);

Tailwind

colors: {
  custom: {
    50: '#6772a0',
    500: '#1f3e79',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e79;
$custom-light: #6772a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e79",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 121
  },
  "hsl": {
    "h": 219.333,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37471,
    "c": 0.10733,
    "h": 261.8
  },
  "luminance": 0.05117
}

Semantic roles & 50–950 ramp

primary

#1F3E79

secondary

#AC8A47

accent

#AC45E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #1F3E79

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

Preview Lab → · Contrast checker → · Palette generator →