#1F356D#1F356D

#1F356D is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.5% C 0.101 H 265.3°. Best body text is #FFFFFF at 11.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F356D
RGB	rgb(31, 53, 109)
HSL	hsl(223, 56%, 27%)
HSV	hsv(223, 72%, 43%)
CMYK	cmyk(71.6%, 51.4%, 0%, 57.3%)
CIE-LAB	lab(23.48, 12.02, -35.19)
CIE-LCH	lch(23.48, 37.19, 288.86°)
OKLab	oklab(34.45% -0.0083 -0.1009)
OKLCH	oklch(34.45% 0.101 265.3)
XYZ	xyz(4.5975, 3.9412, 14.9835)
Luminance	0.0394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F356D #6D571F

analogous

#1F5C6D #1F356D #301F6D

triadic

#1F356D #6D1F35 #356D1F

tetradic

#1F356D #6D1F5C #6D571F #1F6D30

square

#1F356D #6D1F5C #6D571F #1F6D30

split-complementary

#1F356D #6D301F #5C6D1F

monochromatic

#070C18 #111E3D #1F356D #2D4C9D #3E65C8

Accessibility & contrast

On white

11.74

#1F356D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F356D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F356D

11.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F356D	#FFFFFF	#000000	##FFFFFF
##1F356D	1.00	11.74	1.79	11.74
#FFFFFF	11.74	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163C6F

Deuteranopia (green-blind)

#03356C

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f356d;
/* rgb */ color: rgb(31, 53, 109);
/* oklch */ color: oklch(34.5% 0.101 265.3);

Tailwind

colors: {
  custom: {
    50: '#656b97',
    500: '#1f356d',
    950: '#000000',
  },
}

SCSS

$custom: #1f356d;
$custom-light: #656b97;
$custom-dark: #000000;

JSON

{
  "hex": "#1f356d",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 109
  },
  "hsl": {
    "h": 223.077,
    "s": 55.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.34454,
    "c": 0.10125,
    "h": 265.3
  },
  "luminance": 0.03942
}

Semantic roles & 50–950 ramp

primary

#1F356D

secondary

#A18847

accent

#B549DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F356D

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

Preview Lab → · Contrast checker → · Palette generator →