#1F4359#1F4359

#1F4359 is a dark, muted cyan. Relative luminance 0.050; OKLCH L 36.7% C 0.056 H 237.8°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F4359
RGB	rgb(31, 67, 89)
HSL	hsl(203, 48%, 24%)
HSV	hsv(203, 65%, 35%)
CMYK	cmyk(65.2%, 24.7%, 0%, 65.1%)
CIE-LAB	lab(26.81, -5.34, -16.99)
CIE-LCH	lch(26.81, 17.81, 252.55°)
OKLab	oklab(36.67% -0.03 -0.0476)
OKLCH	oklch(36.67% 0.056 237.8)
XYZ	xyz(4.3747, 5.0265, 10.1889)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4359 #59351F

analogous

#1F5952 #1F4359 #1F2659

triadic

#1F4359 #591F43 #43591F

tetradic

#1F4359 #521F59 #59351F #26591F

square

#1F4359 #521F59 #59351F #26591F

split-complementary

#1F4359 #591F26 #59521F

monochromatic

#081117 #0F212C #1F4359 #2F6586 #3F87B4

Accessibility & contrast

On white

10.47

#1F4359 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F4359 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4359

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4359	#FFFFFF	#000000	##FFFFFF
##1F4359	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39435A

Deuteranopia (green-blind)

#313D59

Tritanopia (blue-blind)

#00494A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f4359;
/* rgb */ color: rgb(31, 67, 89);
/* oklch */ color: oklch(36.7% 0.056 237.8);

Tailwind

colors: {
  custom: {
    50: '#617788',
    500: '#1f4359',
    950: '#000000',
  },
}

SCSS

$custom: #1f4359;
$custom-light: #617788;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4359",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 89
  },
  "hsl": {
    "h": 202.759,
    "s": 48.333,
    "l": 23.529
  },
  "oklch": {
    "l": 0.36666,
    "c": 0.05624,
    "h": 237.8
  },
  "luminance": 0.05027
}

Semantic roles & 50–950 ramp

primary

#1F4359

secondary

#8E6146

accent

#8350D8

background

#F5F7F8

surface

#EAEDEF

border

#C6C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1F4359

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

Preview Lab → · Contrast checker → · Palette generator →