#1F356F#1F356F

#1F356F is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.104 H 265.6°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F356F
RGB	rgb(31, 53, 111)
HSL	hsl(224, 56%, 28%)
HSV	hsv(224, 72%, 44%)
CMYK	cmyk(72.1%, 52.3%, 0%, 56.5%)
CIE-LAB	lab(23.62, 12.83, -36.24)
CIE-LCH	lch(23.62, 38.45, 289.49°)
OKLab	oklab(34.61% -0.008 -0.104)
OKLCH	oklch(34.61% 0.104 265.6)
XYZ	xyz(4.7064, 3.9847, 15.5569)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F356F #6F591F

analogous

#1F5D6F #1F356F #311F6F

triadic

#1F356F #6F1F35 #356F1F

tetradic

#1F356F #6F1F5D #6F591F #1F6F31

square

#1F356F #6F1F5D #6F591F #1F6F31

split-complementary

#1F356F #6F311F #5D6F1F

monochromatic

#070B18 #121E3F #1F356F #2C4C9F #3F65C9

Accessibility & contrast

On white

11.69

#1F356F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F356F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F356F

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F356F	#FFFFFF	#000000	##FFFFFF
##1F356F	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#143C71

Deuteranopia (green-blind)

#00356E

Tritanopia (blue-blind)

#00434C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f356f;
/* rgb */ color: rgb(31, 53, 111);
/* oklch */ color: oklch(34.6% 0.104 265.6);

Tailwind

colors: {
  custom: {
    50: '#656b99',
    500: '#1f356f',
    950: '#000000',
  },
}

SCSS

$custom: #1f356f;
$custom-light: #656b99;
$custom-dark: #000000;

JSON

{
  "hex": "#1f356f",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 111
  },
  "hsl": {
    "h": 223.5,
    "s": 56.338,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34611,
    "c": 0.10431,
    "h": 265.6
  },
  "luminance": 0.03985
}

Semantic roles & 50–950 ramp

primary

#1F356F

secondary

#A38A47

accent

#B648E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F356F

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

Preview Lab → · Contrast checker → · Palette generator →