#1F557D#1F557D

#1F557D is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.4% C 0.087 H 244.4°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F557D
RGB	rgb(31, 85, 125)
HSL	hsl(206, 60%, 31%)
HSV	hsv(206, 75%, 49%)
CMYK	cmyk(75.2%, 32%, 0%, 51%)
CIE-LAB	lab(34.54, -3.23, -27.68)
CIE-LCH	lch(34.54, 27.87, 263.34°)
OKLab	oklab(43.37% -0.0376 -0.0784)
OKLCH	oklch(43.37% 0.087 244.4)
XYZ	xyz(7.5138, 8.2681, 20.5980)
Luminance	0.0827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F557D #7D471F

analogous

#1F7D76 #1F557D #1F267D

triadic

#1F557D #7D1F55 #557D1F

tetradic

#1F557D #761F7D #7D471F #267D1F

square

#1F557D #761F7D #7D471F #267D1F

split-complementary

#1F557D #7D1F26 #7D761F

monochromatic

#07121B #13344C #1F557D #2B76AE #4596D1

Accessibility & contrast

On white

7.91

#1F557D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1F557D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F557D

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F557D	#FFFFFF	#000000	##FFFFFF
##1F557D	1.00	7.91	2.65	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#43567F

Deuteranopia (green-blind)

#364D7C

Tritanopia (blue-blind)

#005F63

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f557d;
/* rgb */ color: rgb(31, 85, 125);
/* oklch */ color: oklch(43.4% 0.087 244.4);

Tailwind

colors: {
  custom: {
    50: '#6884a3',
    500: '#1f557d',
    950: '#000000',
  },
}

SCSS

$custom: #1f557d;
$custom-light: #6884a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f557d",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 125
  },
  "hsl": {
    "h": 205.532,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.43373,
    "c": 0.08694,
    "h": 244.4
  },
  "luminance": 0.08269
}

Semantic roles & 50–950 ramp

primary

#1F557D

secondary

#B07448

accent

#8844E3

background

#F6F8FA

surface

#EBEFF3

border

#C6CACD

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1F557D

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

Preview Lab → · Contrast checker → · Palette generator →