#1F3D80#1F3D80

#1F3D80 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.8% C 0.119 H 263.6°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D80
RGB	rgb(31, 61, 128)
HSL	hsl(221, 61%, 31%)
HSV	hsv(221, 76%, 50%)
CMYK	cmyk(75.8%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(27.26, 14.03, -41.14)
CIE-LCH	lch(27.26, 43.47, 288.83°)
OKLab	oklab(37.78% -0.0133 -0.1183)
OKLCH	oklch(37.78% 0.119 263.6)
XYZ	xyz(6.1287, 5.1866, 21.0960)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D80 #80621F

analogous

#1F6D80 #1F3D80 #311F80

triadic

#1F3D80 #801F3D #3D801F

tetradic

#1F3D80 #801F6D #80621F #1F8031

square

#1F3D80 #801F6D #80621F #1F8031

split-complementary

#1F3D80 #80311F #6D801F

monochromatic

#070E1D #13264F #1F3D80 #2B54B1 #4772D2

Accessibility & contrast

On white

10.31

#1F3D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1F3D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D80

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D80	#FFFFFF	#000000	##FFFFFF
##1F3D80	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144582

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3d80;
/* rgb */ color: rgb(31, 61, 128);
/* oklch */ color: oklch(37.8% 0.119 263.6);

Tailwind

colors: {
  custom: {
    50: '#6972a5',
    500: '#1f3d80',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d80;
$custom-light: #6972a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d80",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 221.443,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.3778,
    "c": 0.11902,
    "h": 263.6
  },
  "luminance": 0.05187
}

Semantic roles & 50–950 ramp

primary

#1F3D80

secondary

#B39248

accent

#B244E4

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F3D80

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

Preview Lab → · Contrast checker → · Palette generator →