#1F577F#1F577F

#1F577F is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.0% C 0.088 H 243.6°. Best body text is #FFFFFF at 7.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F577F
RGB	rgb(31, 87, 127)
HSL	hsl(205, 61%, 31%)
HSV	hsv(205, 76%, 50%)
CMYK	cmyk(75.6%, 31.5%, 0%, 50.2%)
CIE-LAB	lab(35.28, -3.73, -27.74)
CIE-LCH	lch(35.28, 27.99, 262.35°)
OKLab	oklab(44% -0.039 -0.0785)
OKLCH	oklch(44% 0.088 243.6)
XYZ	xyz(7.8026, 8.6391, 21.3309)
Luminance	0.0864 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F577F #7F471F

analogous

#1F7F77 #1F577F #1F277F

triadic

#1F577F #7F1F57 #577F1F

tetradic

#1F577F #771F7F #7F471F #277F1F

square

#1F577F #771F7F #7F471F #277F1F

split-complementary

#1F577F #7F1F27 #7F771F

monochromatic

#07141D #13354E #1F577F #2B79B0 #4698D2

Accessibility & contrast

On white

7.70

#1F577F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1F577F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F577F

7.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F577F	#FFFFFF	#000000	##FFFFFF
##1F577F	1.00	7.70	2.73	7.70
#FFFFFF	7.70	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#455881

Deuteranopia (green-blind)

#374F7E

Tritanopia (blue-blind)

#006165

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f577f;
/* rgb */ color: rgb(31, 87, 127);
/* oklch */ color: oklch(44.0% 0.088 243.6);

Tailwind

colors: {
  custom: {
    50: '#6986a4',
    500: '#1f577f',
    950: '#000000',
  },
}

SCSS

$custom: #1f577f;
$custom-light: #6986a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f577f",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 127
  },
  "hsl": {
    "h": 205,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.43995,
    "c": 0.0877,
    "h": 243.6
  },
  "luminance": 0.0864
}

Semantic roles & 50–950 ramp

primary

#1F577F

secondary

#B27448

accent

#8744E4

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1F577F

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

Preview Lab → · Contrast checker → · Palette generator →