#1F368D#1F368D

#1F368D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.147 H 267.3°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F368D
RGB	rgb(31, 54, 141)
HSL	hsl(227, 64%, 34%)
HSV	hsv(227, 78%, 55%)
CMYK	cmyk(78%, 61.7%, 0%, 44.7%)
CIE-LAB	lab(26.31, 24.08, -50.78)
CIE-LCH	lch(26.31, 56.20, 295.37°)
OKLab	oklab(37.39% -0.0069 -0.1467)
OKLCH	oklch(37.39% 0.147 267.3)
XYZ	xyz(6.6903, 4.8520, 25.7781)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F368D #8D761F

analogous

#1F6D8D #1F368D #3F1F8D

triadic

#1F368D #8D1F36 #368D1F

tetradic

#1F368D #8D1F6D #8D761F #1F8D3F

square

#1F368D #8D1F6D #8D761F #1F8D3F

split-complementary

#1F368D #8D3F1F #6D8D1F

monochromatic

#091029 #14235B #1F368D #2A49BF #4E6BD8

Accessibility & contrast

On white

10.66

#1F368D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F368D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F368D

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F368D	#FFFFFF	#000000	##FFFFFF
##1F368D	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#00398B

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f368d;
/* rgb */ color: rgb(31, 54, 141);
/* oklch */ color: oklch(37.4% 0.147 267.3);

Tailwind

colors: {
  custom: {
    50: '#6d6caf',
    500: '#1f368d',
    950: '#000000',
  },
}

SCSS

$custom: #1f368d;
$custom-light: #6d6caf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f368d",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 141
  },
  "hsl": {
    "h": 227.455,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.3739,
    "c": 0.14687,
    "h": 267.3
  },
  "luminance": 0.04853
}

Semantic roles & 50–950 ramp

primary

#1F368D

secondary

#BBA44D

accent

#C441E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F368D

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

Preview Lab → · Contrast checker → · Palette generator →