#1F366B#1F366B

#1F366B is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.5% C 0.097 H 264.3°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F366B
RGB	rgb(31, 54, 107)
HSL	hsl(222, 55%, 27%)
HSV	hsv(222, 71%, 42%)
CMYK	cmyk(71%, 49.5%, 0%, 58%)
CIE-LAB	lab(23.64, 10.51, -33.64)
CIE-LCH	lch(23.64, 35.25, 287.36°)
OKLab	oklab(34.53% -0.0096 -0.0963)
OKLCH	oklch(34.53% 0.097 264.3)
XYZ	xyz(4.5372, 3.9907, 14.4382)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F366B #6B541F

analogous

#1F5C6B #1F366B #2E1F6B

triadic

#1F366B #6B1F36 #366B1F

tetradic

#1F366B #6B1F5C #6B541F #1F6B2E

square

#1F366B #6B1F5C #6B541F #1F6B2E

split-complementary

#1F366B #6B2E1F #5C6B1F

monochromatic

#070C18 #111E3C #1F366B #2D4E9A #3D67C7

Accessibility & contrast

On white

11.68

#1F366B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F366B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F366B

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F366B	#FFFFFF	#000000	##FFFFFF
##1F366B	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B3C6D

Deuteranopia (green-blind)

#0B356A

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f366b;
/* rgb */ color: rgb(31, 54, 107);
/* oklch */ color: oklch(34.5% 0.097 264.3);

Tailwind

colors: {
  custom: {
    50: '#646c96',
    500: '#1f366b',
    950: '#000000',
  },
}

SCSS

$custom: #1f366b;
$custom-light: #646c96;
$custom-dark: #000000;

JSON

{
  "hex": "#1f366b",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 107
  },
  "hsl": {
    "h": 221.842,
    "s": 55.072,
    "l": 27.059
  },
  "oklch": {
    "l": 0.34534,
    "c": 0.09681,
    "h": 264.3
  },
  "luminance": 0.03991
}

Semantic roles & 50–950 ramp

primary

#1F366B

secondary

#9F8447

accent

#B149DE

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1F366B

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

Preview Lab → · Contrast checker → · Palette generator →