#1F4B71#1F4B71

#1F4B71 is a dark, moderate cyan. Relative luminance 0.065; OKLCH L 40.1% C 0.081 H 247.5°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B71
RGB	rgb(31, 75, 113)
HSL	hsl(208, 57%, 28%)
HSV	hsv(208, 73%, 44%)
CMYK	cmyk(72.6%, 33.6%, 0%, 55.7%)
CIE-LAB	lab(30.68, -1.44, -26.28)
CIE-LCH	lch(30.68, 26.31, 266.87°)
OKLab	oklab(40.12% -0.0308 -0.0744)
OKLCH	oklch(40.12% 0.081 247.5)
XYZ	xyz(6.0607, 6.5151, 16.5577)
Luminance	0.0652 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B71 #71451F

analogous

#1F716E #1F4B71 #1F2271

triadic

#1F4B71 #711F4B #4B711F

tetradic

#1F4B71 #6E1F71 #71451F #22711F

square

#1F4B71 #6E1F71 #71451F #22711F

split-complementary

#1F4B71 #711F22 #716E1F

monochromatic

#071018 #122B41 #1F4B71 #2C6BA1 #408ACB

Accessibility & contrast

On white

9.12

#1F4B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1F4B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B71

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B71	#FFFFFF	#000000	##FFFFFF
##1F4B71	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A4D73

Deuteranopia (green-blind)

#2F4570

Tritanopia (blue-blind)

#005459

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f4b71;
/* rgb */ color: rgb(31, 75, 113);
/* oklch */ color: oklch(40.1% 0.081 247.5);

Tailwind

colors: {
  custom: {
    50: '#657d9a',
    500: '#1f4b71',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b71;
$custom-light: #657d9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b71",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 113
  },
  "hsl": {
    "h": 207.805,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.40123,
    "c": 0.08053,
    "h": 247.5
  },
  "luminance": 0.06516
}

Semantic roles & 50–950 ramp

primary

#1F4B71

secondary

#A57247

accent

#8E48E0

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1F4B71

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

Preview Lab → · Contrast checker → · Palette generator →