#1F358F#1F358F

#1F358F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.4% C 0.151 H 267.7°. Best body text is #FFFFFF at 10.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F358F
RGB	rgb(31, 53, 143)
HSL	hsl(228, 64%, 34%)
HSV	hsv(228, 78%, 56%)
CMYK	cmyk(78.3%, 62.9%, 0%, 43.9%)
CIE-LAB	lab(26.22, 25.55, -52.17)
CIE-LCH	lch(26.22, 58.09, 296.09°)
OKLab	oklab(37.38% -0.0062 -0.1508)
OKLCH	oklch(37.38% 0.151 267.7)
XYZ	xyz(6.7944, 4.8199, 26.5535)
Luminance	0.0482 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F358F #8F791F

analogous

#1F6D8F #1F358F #411F8F

triadic

#1F358F #8F1F35 #358F1F

tetradic

#1F358F #8F1F6D #8F791F #1F8F41

square

#1F358F #8F1F6D #8F791F #1F8F41

split-complementary

#1F358F #8F411F #6D8F1F

monochromatic

#09102A #14225D #1F358F #2A48C1 #4F6AD9

Accessibility & contrast

On white

10.69

#1F358F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1F358F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F358F

10.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F358F	#FFFFFF	#000000	##FFFFFF
##1F358F	1.00	10.69	1.96	10.69
#FFFFFF	10.69	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004392

Deuteranopia (green-blind)

#00398D

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f358f;
/* rgb */ color: rgb(31, 53, 143);
/* oklch */ color: oklch(37.4% 0.151 267.7);

Tailwind

colors: {
  custom: {
    50: '#6d6cb1',
    500: '#1f358f',
    950: '#000000',
  },
}

SCSS

$custom: #1f358f;
$custom-light: #6d6cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f358f",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 143
  },
  "hsl": {
    "h": 228.214,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.37375,
    "c": 0.15093,
    "h": 267.7
  },
  "luminance": 0.04821
}

Semantic roles & 50–950 ramp

primary

#1F358F

secondary

#BCA64E

accent

#C740E7

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F358F

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

Preview Lab → · Contrast checker → · Palette generator →