#1F3686#1F3686

#1F3686 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.137 H 267.1°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F3686
RGB	rgb(31, 54, 134)
HSL	hsl(227, 62%, 32%)
HSV	hsv(227, 77%, 53%)
CMYK	cmyk(76.9%, 59.7%, 0%, 47.5%)
CIE-LAB	lab(25.71, 21.32, -47.40)
CIE-LCH	lch(25.71, 51.97, 294.22°)
OKLab	oklab(36.76% -0.007 -0.1368)
OKLCH	oklch(36.76% 0.137 267.1)
XYZ	xyz(6.1858, 4.6502, 23.1212)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3686 #866F1F

analogous

#1F6A86 #1F3686 #3C1F86

triadic

#1F3686 #861F36 #36861F

tetradic

#1F3686 #861F6A #866F1F #1F863C

square

#1F3686 #861F6A #866F1F #1F863C

split-complementary

#1F3686 #863C1F #6A861F

monochromatic

#080E23 #142254 #1F3686 #2A4AB8 #4A69D5

Accessibility & contrast

On white

10.88

#1F3686 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F3686 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3686

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3686	#FFFFFF	#000000	##FFFFFF
##1F3686	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004289

Deuteranopia (green-blind)

#003884

Tritanopia (blue-blind)

#004A58

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f3686;
/* rgb */ color: rgb(31, 54, 134);
/* oklch */ color: oklch(36.8% 0.137 267.1);

Tailwind

colors: {
  custom: {
    50: '#6b6caa',
    500: '#1f3686',
    950: '#000000',
  },
}

SCSS

$custom: #1f3686;
$custom-light: #6b6caa;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3686",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 134
  },
  "hsl": {
    "h": 226.602,
    "s": 62.424,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36761,
    "c": 0.13697,
    "h": 267.1
  },
  "luminance": 0.04651
}

Semantic roles & 50–950 ramp

primary

#1F3686

secondary

#B89F49

accent

#C142E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3686

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

Preview Lab → · Contrast checker → · Palette generator →