#1F3563#1F3563

#1F3563 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.7% C 0.086 H 263.3°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#1F3563
RGB	rgb(31, 53, 99)
HSL	hsl(221, 52%, 25%)
HSV	hsv(221, 69%, 39%)
CMYK	cmyk(68.7%, 46.5%, 0%, 61.2%)
CIE-LAB	lab(22.79, 8.03, -29.83)
CIE-LCH	lch(22.79, 30.89, 285.06°)
OKLab	oklab(33.7% -0.01 -0.0851)
OKLCH	oklch(33.7% 0.086 263.3)
XYZ	xyz(4.0895, 3.7380, 12.3079)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3563 #634D1F

analogous

#1F5763 #1F3563 #2B1F63

triadic

#1F3563 #631F35 #35631F

tetradic

#1F3563 #631F57 #634D1F #1F632B

square

#1F3563 #631F57 #634D1F #1F632B

split-complementary

#1F3563 #632B1F #57631F

monochromatic

#070C17 #101C34 #1F3563 #2E4E92 #3C67C0

Accessibility & contrast

On white

12.02

#1F3563 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F3563 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3563

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3563	#FFFFFF	#000000	##FFFFFF
##1F3563	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3A65

Deuteranopia (green-blind)

#143362

Tritanopia (blue-blind)

#003F47

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f3563;
/* rgb */ color: rgb(31, 53, 99);
/* oklch */ color: oklch(33.7% 0.086 263.3);

Tailwind

colors: {
  custom: {
    50: '#636b90',
    500: '#1f3563',
    950: '#000000',
  },
}

SCSS

$custom: #1f3563;
$custom-light: #636b90;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3563",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 99
  },
  "hsl": {
    "h": 220.588,
    "s": 52.308,
    "l": 25.49
  },
  "oklch": {
    "l": 0.33703,
    "c": 0.08573,
    "h": 263.3
  },
  "luminance": 0.03738
}

Semantic roles & 50–950 ramp

primary

#1F3563

secondary

#987D46

accent

#AD4CDC

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#06060C

muted

#7A7A7D

Preview Lab

Preview with #1F3563

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

Preview Lab → · Contrast checker → · Palette generator →