#1F357D#1F357D

#1F357D is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.8% C 0.125 H 267.0°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#1F357D
RGB	rgb(31, 53, 125)
HSL	hsl(226, 60%, 31%)
HSV	hsv(226, 75%, 49%)
CMYK	cmyk(75.2%, 57.6%, 0%, 51%)
CIE-LAB	lab(24.69, 18.44, -43.41)
CIE-LCH	lch(24.69, 47.16, 293.01°)
OKLab	oklab(35.76% -0.0066 -0.1251)
OKLCH	oklch(35.76% 0.125 267)
XYZ	xyz(5.5386, 4.3176, 19.9395)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F357D #7D671F

analogous

#1F647D #1F357D #381F7D

triadic

#1F357D #7D1F35 #357D1F

tetradic

#1F357D #7D1F64 #7D671F #1F7D38

square

#1F357D #7D1F64 #7D671F #1F7D38

split-complementary

#1F357D #7D381F #647D1F

monochromatic

#070B1B #13204C #1F357D #2B4AAE #4566D1

Accessibility & contrast

On white

11.27

#1F357D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F357D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F357D

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F357D	#FFFFFF	#000000	##FFFFFF
##1F357D	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F7F

Deuteranopia (green-blind)

#00367C

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f357d;
/* rgb */ color: rgb(31, 53, 125);
/* oklch */ color: oklch(35.8% 0.125 267.0);

Tailwind

colors: {
  custom: {
    50: '#696ba3',
    500: '#1f357d',
    950: '#000000',
  },
}

SCSS

$custom: #1f357d;
$custom-light: #696ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f357d",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 125
  },
  "hsl": {
    "h": 225.957,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.35764,
    "c": 0.12527,
    "h": 267
  },
  "luminance": 0.04318
}

Semantic roles & 50–950 ramp

primary

#1F357D

secondary

#B09848

accent

#BE44E3

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F357D

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

Preview Lab → · Contrast checker → · Palette generator →