#1F3679#1F3679

#1F3679 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.6% C 0.118 H 266.2°. Best body text is #FFFFFF at 11.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F3679
RGB	rgb(31, 54, 121)
HSL	hsl(225, 59%, 30%)
HSV	hsv(225, 74%, 47%)
CMYK	cmyk(74.4%, 55.4%, 0%, 52.5%)
CIE-LAB	lab(24.67, 16.13, -40.92)
CIE-LCH	lch(24.67, 43.99, 291.51°)
OKLab	oklab(35.65% -0.0078 -0.1177)
OKLCH	oklch(35.65% 0.118 266.2)
XYZ	xyz(5.3342, 4.3096, 18.6362)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3679 #79621F

analogous

#1F6379 #1F3679 #351F79

triadic

#1F3679 #791F36 #36791F

tetradic

#1F3679 #791F63 #79621F #1F7935

square

#1F3679 #791F63 #79621F #1F7935

split-complementary

#1F3679 #79351F #63791F

monochromatic

#060B18 #132048 #1F3679 #2B4CAA #4367CF

Accessibility & contrast

On white

11.28

#1F3679 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F3679 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3679

11.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3679	#FFFFFF	#000000	##FFFFFF
##1F3679	1.00	11.28	1.86	11.28
#FFFFFF	11.28	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#063F7B

Deuteranopia (green-blind)

#003778

Tritanopia (blue-blind)

#004652

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3679;
/* rgb */ color: rgb(31, 54, 121);
/* oklch */ color: oklch(35.6% 0.118 266.2);

Tailwind

colors: {
  custom: {
    50: '#686ca0',
    500: '#1f3679',
    950: '#000000',
  },
}

SCSS

$custom: #1f3679;
$custom-light: #686ca0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3679",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 121
  },
  "hsl": {
    "h": 224.667,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35646,
    "c": 0.11801,
    "h": 266.2
  },
  "luminance": 0.0431
}

Semantic roles & 50–950 ramp

primary

#1F3679

secondary

#AC9347

accent

#BA45E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #1F3679

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

Preview Lab → · Contrast checker → · Palette generator →