#1F4F71#1F4F71

#1F4F71 is a dark, moderate cyan. Relative luminance 0.071; OKLCH L 41.1% C 0.077 H 242.8°. Best body text is #FFFFFF at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F4F71
RGB	rgb(31, 79, 113)
HSL	hsl(205, 57%, 28%)
HSV	hsv(205, 73%, 44%)
CMYK	cmyk(72.6%, 30.1%, 0%, 55.7%)
CIE-LAB	lab(31.98, -4.01, -24.23)
CIE-LCH	lch(31.98, 24.56, 260.60°)
OKLab	oklab(41.15% -0.0352 -0.0684)
OKLCH	oklch(41.15% 0.077 242.8)
XYZ	xyz(6.3406, 7.0748, 16.6510)
Luminance	0.0708 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4F71 #71411F

analogous

#1F716A #1F4F71 #1F2671

triadic

#1F4F71 #711F4F #4F711F

tetradic

#1F4F71 #6A1F71 #71411F #26711F

square

#1F4F71 #6A1F71 #71411F #26711F

split-complementary

#1F4F71 #711F26 #716A1F

monochromatic

#071118 #122D41 #1F4F71 #2C71A1 #4091CB

Accessibility & contrast

On white

8.69

#1F4F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1F4F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4F71

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4F71	#FFFFFF	#000000	##FFFFFF
##1F4F71	1.00	8.69	2.42	8.69
#FFFFFF	8.69	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#405073

Deuteranopia (green-blind)

#344870

Tritanopia (blue-blind)

#00575B

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f4f71;
/* rgb */ color: rgb(31, 79, 113);
/* oklch */ color: oklch(41.1% 0.077 242.8);

Tailwind

colors: {
  custom: {
    50: '#66809a',
    500: '#1f4f71',
    950: '#000000',
  },
}

SCSS

$custom: #1f4f71;
$custom-light: #66809a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4f71",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 113
  },
  "hsl": {
    "h": 204.878,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.41148,
    "c": 0.07695,
    "h": 242.8
  },
  "luminance": 0.07076
}

Semantic roles & 50–950 ramp

primary

#1F4F71

secondary

#A56E47

accent

#8748E0

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0E

muted

#7A7C7E

Preview Lab

Preview with #1F4F71

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

Preview Lab → · Contrast checker → · Palette generator →