#1F366F#1F366F

#1F366F is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.8% C 0.103 H 265.0°. Best body text is #FFFFFF at 11.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F366F
RGB	rgb(31, 54, 111)
HSL	hsl(223, 56%, 28%)
HSV	hsv(223, 72%, 44%)
CMYK	cmyk(72.1%, 51.4%, 0%, 56.5%)
CIE-LAB	lab(23.92, 12.12, -35.76)
CIE-LCH	lch(23.92, 37.75, 288.72°)
OKLab	oklab(34.84% -0.009 -0.1025)
OKLCH	oklch(34.84% 0.103 265)
XYZ	xyz(4.7525, 4.0769, 15.5723)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F366F #6F581F

analogous

#1F5E6F #1F366F #301F6F

triadic

#1F366F #6F1F36 #366F1F

tetradic

#1F366F #6F1F5E #6F581F #1F6F30

square

#1F366F #6F1F5E #6F581F #1F6F30

split-complementary

#1F366F #6F301F #5E6F1F

monochromatic

#070C18 #121F3F #1F366F #2C4D9F #3F67C9

Accessibility & contrast

On white

11.57

#1F366F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1F366F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F366F

11.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F366F	#FFFFFF	#000000	##FFFFFF
##1F366F	1.00	11.57	1.82	11.57
#FFFFFF	11.57	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#173D71

Deuteranopia (green-blind)

#02356E

Tritanopia (blue-blind)

#00434D

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f366f;
/* rgb */ color: rgb(31, 54, 111);
/* oklch */ color: oklch(34.8% 0.103 265.0);

Tailwind

colors: {
  custom: {
    50: '#656c99',
    500: '#1f366f',
    950: '#000000',
  },
}

SCSS

$custom: #1f366f;
$custom-light: #656c99;
$custom-dark: #000000;

JSON

{
  "hex": "#1f366f",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 111
  },
  "hsl": {
    "h": 222.75,
    "s": 56.338,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34842,
    "c": 0.10294,
    "h": 265
  },
  "luminance": 0.04077
}

Semantic roles & 50–950 ramp

primary

#1F366F

secondary

#A38847

accent

#B448E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F366F

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

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