#1F358D#1F358D

#1F358D is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.148 H 267.6°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F358D
RGB	rgb(31, 53, 141)
HSL	hsl(228, 64%, 34%)
HSV	hsv(228, 78%, 55%)
CMYK	cmyk(78%, 62.4%, 0%, 44.7%)
CIE-LAB	lab(26.04, 24.77, -51.22)
CIE-LCH	lch(26.04, 56.89, 295.80°)
OKLab	oklab(37.19% -0.0062 -0.148)
OKLCH	oklch(37.19% 0.148 267.6)
XYZ	xyz(6.6442, 4.7599, 25.7627)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F358D #8D771F

analogous

#1F6C8D #1F358D #401F8D

triadic

#1F358D #8D1F35 #358D1F

tetradic

#1F358D #8D1F6C #8D771F #1F8D40

square

#1F358D #8D1F6C #8D771F #1F8D40

split-complementary

#1F358D #8D401F #6C8D1F

monochromatic

#090F29 #14225B #1F358D #2A48BF #4E6AD8

Accessibility & contrast

On white

10.76

#1F358D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1F358D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F358D

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F358D	#FFFFFF	#000000	##FFFFFF
##1F358D	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004390

Deuteranopia (green-blind)

#00398B

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f358d;
/* rgb */ color: rgb(31, 53, 141);
/* oklch */ color: oklch(37.2% 0.148 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d6caf',
    500: '#1f358d',
    950: '#000000',
  },
}

SCSS

$custom: #1f358d;
$custom-light: #6d6caf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f358d",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 141
  },
  "hsl": {
    "h": 228,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.3719,
    "c": 0.14815,
    "h": 267.6
  },
  "luminance": 0.04761
}

Semantic roles & 50–950 ramp

primary

#1F358D

secondary

#BBA54D

accent

#C641E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F358D

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

Preview Lab → · Contrast checker → · Palette generator →