#1F4563#1F4563

#1F4563 is a dark, moderate cyan. Relative luminance 0.054; OKLCH L 37.8% C 0.067 H 244.8°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F4563
RGB	rgb(31, 69, 99)
HSL	hsl(206, 52%, 25%)
HSV	hsv(206, 69%, 39%)
CMYK	cmyk(68.7%, 30.3%, 0%, 61.2%)
CIE-LAB	lab(27.97, -2.89, -21.63)
CIE-LCH	lch(27.97, 21.82, 262.38°)
OKLab	oklab(37.75% -0.0287 -0.061)
OKLCH	oklch(37.75% 0.067 244.8)
XYZ	xyz(4.9445, 5.4479, 12.5929)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4563 #633D1F

analogous

#1F635F #1F4563 #1F2363

triadic

#1F4563 #631F45 #45631F

tetradic

#1F4563 #5F1F63 #633D1F #23631F

square

#1F4563 #5F1F63 #633D1F #23631F

split-complementary

#1F4563 #631F23 #635F1F

monochromatic

#071017 #102534 #1F4563 #2E6592 #3C86C0

Accessibility & contrast

On white

10.05

#1F4563 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1F4563 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4563

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4563	#FFFFFF	#000000	##FFFFFF
##1F4563	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#384664

Deuteranopia (green-blind)

#2E3F62

Tritanopia (blue-blind)

#004C4F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f4563;
/* rgb */ color: rgb(31, 69, 99);
/* oklch */ color: oklch(37.8% 0.067 244.8);

Tailwind

colors: {
  custom: {
    50: '#63788f',
    500: '#1f4563',
    950: '#000000',
  },
}

SCSS

$custom: #1f4563;
$custom-light: #63788f;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4563",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 99
  },
  "hsl": {
    "h": 206.471,
    "s": 52.308,
    "l": 25.49
  },
  "oklch": {
    "l": 0.37751,
    "c": 0.06736,
    "h": 244.8
  },
  "luminance": 0.05448
}

Semantic roles & 50–950 ramp

primary

#1F4563

secondary

#986A46

accent

#8B4CDC

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#06090C

muted

#7A7B7D

Preview Lab

Preview with #1F4563

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

Preview Lab → · Contrast checker → · Palette generator →