#1F3663#1F3663

#1F3663 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.9% C 0.084 H 262.4°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F3663
RGB	rgb(31, 54, 99)
HSL	hsl(220, 52%, 25%)
HSV	hsv(220, 69%, 39%)
CMYK	cmyk(68.7%, 45.5%, 0%, 61.2%)
CIE-LAB	lab(23.10, 7.32, -29.33)
CIE-LCH	lch(23.10, 30.23, 284.01°)
OKLab	oklab(33.95% -0.0111 -0.0836)
OKLCH	oklch(33.95% 0.084 262.4)
XYZ	xyz(4.1356, 3.8301, 12.3233)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3663 #634C1F

analogous

#1F5863 #1F3663 #2A1F63

triadic

#1F3663 #631F36 #36631F

tetradic

#1F3663 #631F58 #634C1F #1F632A

square

#1F3663 #631F58 #634C1F #1F632A

split-complementary

#1F3663 #632A1F #58631F

monochromatic

#070D17 #101D34 #1F3663 #2E4F92 #3C69C0

Accessibility & contrast

On white

11.89

#1F3663 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F3663 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3663

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3663	#FFFFFF	#000000	##FFFFFF
##1F3663	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#213A65

Deuteranopia (green-blind)

#173462

Tritanopia (blue-blind)

#004047

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f3663;
/* rgb */ color: rgb(31, 54, 99);
/* oklch */ color: oklch(33.9% 0.084 262.4);

Tailwind

colors: {
  custom: {
    50: '#636c90',
    500: '#1f3663',
    950: '#000000',
  },
}

SCSS

$custom: #1f3663;
$custom-light: #636c90;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3663",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 99
  },
  "hsl": {
    "h": 219.706,
    "s": 52.308,
    "l": 25.49
  },
  "oklch": {
    "l": 0.33946,
    "c": 0.08438,
    "h": 262.4
  },
  "luminance": 0.0383
}

Semantic roles & 50–950 ramp

primary

#1F3663

secondary

#987C46

accent

#AB4CDC

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #1F3663

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

Preview Lab → · Contrast checker → · Palette generator →