#1F3D78#1F3D78

#1F3D78 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.107 H 262.2°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D78
RGB	rgb(31, 61, 120)
HSL	hsl(220, 59%, 30%)
HSV	hsv(220, 74%, 47%)
CMYK	cmyk(74.2%, 49.2%, 0%, 52.9%)
CIE-LAB	lab(26.69, 10.81, -37.03)
CIE-LCH	lch(26.69, 38.58, 286.28°)
OKLab	oklab(37.16% -0.0145 -0.1062)
OKLCH	oklch(37.16% 0.107 262.2)
XYZ	xyz(5.6228, 4.9843, 18.4314)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D78 #785A1F

analogous

#1F6A78 #1F3D78 #2E1F78

triadic

#1F3D78 #781F3D #3D781F

tetradic

#1F3D78 #781F6A #785A1F #1F782E

square

#1F3D78 #781F6A #785A1F #1F782E

split-complementary

#1F3D78 #782E1F #6A781F

monochromatic

#060C18 #122447 #1F3D78 #2C56A9 #4372CE

Accessibility & contrast

On white

10.52

#1F3D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F3D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D78

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D78	#FFFFFF	#000000	##FFFFFF
##1F3D78	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)

#1E437A

Deuteranopia (green-blind)

#083B77

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3d78;
/* rgb */ color: rgb(31, 61, 120);
/* oklch */ color: oklch(37.2% 0.107 262.2);

Tailwind

colors: {
  custom: {
    50: '#67729f',
    500: '#1f3d78',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d78;
$custom-light: #67729f;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d78",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 120
  },
  "hsl": {
    "h": 219.775,
    "s": 58.94,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37162,
    "c": 0.10716,
    "h": 262.2
  },
  "luminance": 0.04985
}

Semantic roles & 50–950 ramp

primary

#1F3D78

secondary

#AB8A47

accent

#AD46E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #1F3D78

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

Preview Lab → · Contrast checker → · Palette generator →