#1F557F#1F557F

#1F557F is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.5% C 0.089 H 245.6°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F557F
RGB	rgb(31, 85, 127)
HSL	hsl(206, 61%, 31%)
HSV	hsv(206, 76%, 50%)
CMYK	cmyk(75.6%, 33.1%, 0%, 50.2%)
CIE-LAB	lab(34.64, -2.46, -28.75)
CIE-LCH	lch(34.64, 28.86, 265.10°)
OKLab	oklab(43.49% -0.037 -0.0815)
OKLCH	oklch(43.49% 0.089 245.6)
XYZ	xyz(7.6429, 8.3197, 21.2776)
Luminance	0.0832 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F557F #7F491F

analogous

#1F7F79 #1F557F #1F257F

triadic

#1F557F #7F1F55 #557F1F

tetradic

#1F557F #791F7F #7F491F #257F1F

square

#1F557F #791F7F #7F491F #257F1F

split-complementary

#1F557F #7F1F25 #7F791F

monochromatic

#07131D #13344E #1F557F #2B76B0 #4695D2

Accessibility & contrast

On white

7.88

#1F557F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1F557F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F557F

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F557F	#FFFFFF	#000000	##FFFFFF
##1F557F	1.00	7.88	2.66	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#425681

Deuteranopia (green-blind)

#344D7E

Tritanopia (blue-blind)

#005F64

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f557f;
/* rgb */ color: rgb(31, 85, 127);
/* oklch */ color: oklch(43.5% 0.089 245.6);

Tailwind

colors: {
  custom: {
    50: '#6884a4',
    500: '#1f557f',
    950: '#000000',
  },
}

SCSS

$custom: #1f557f;
$custom-light: #6884a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f557f",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 127
  },
  "hsl": {
    "h": 206.25,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.4349,
    "c": 0.08948,
    "h": 245.6
  },
  "luminance": 0.08321
}

Semantic roles & 50–950 ramp

primary

#1F557F

secondary

#B27648

accent

#8A44E4

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1F557F

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

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