#1F557B#1F557B

#1F557B is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.3% C 0.084 H 243.0°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F557B
RGB	rgb(31, 85, 123)
HSL	hsl(205, 60%, 30%)
HSV	hsv(205, 75%, 48%)
CMYK	cmyk(74.8%, 30.9%, 0%, 51.8%)
CIE-LAB	lab(34.43, -4.00, -26.61)
CIE-LCH	lch(34.43, 26.91, 261.45°)
OKLab	oklab(43.26% -0.0383 -0.0752)
OKLCH	oklch(43.26% 0.084 243)
XYZ	xyz(7.3873, 8.2175, 19.9319)
Luminance	0.0822 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F557B #7B451F

analogous

#1F7B73 #1F557B #1F277B

triadic

#1F557B #7B1F55 #557B1F

tetradic

#1F557B #731F7B #7B451F #277B1F

square

#1F557B #731F7B #7B451F #277B1F

split-complementary

#1F557B #7B1F27 #7B731F

monochromatic

#061119 #13334A #1F557B #2B77AC #4496D0

Accessibility & contrast

On white

7.94

#1F557B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1F557B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F557B

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F557B	#FFFFFF	#000000	##FFFFFF
##1F557B	1.00	7.94	2.64	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#44567D

Deuteranopia (green-blind)

#374D7A

Tritanopia (blue-blind)

#005E62

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f557b;
/* rgb */ color: rgb(31, 85, 123);
/* oklch */ color: oklch(43.3% 0.084 243.0);

Tailwind

colors: {
  custom: {
    50: '#6884a1',
    500: '#1f557b',
    950: '#000000',
  },
}

SCSS

$custom: #1f557b;
$custom-light: #6884a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f557b",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 123
  },
  "hsl": {
    "h": 204.783,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.43257,
    "c": 0.08443,
    "h": 243
  },
  "luminance": 0.08218
}

Semantic roles & 50–950 ramp

primary

#1F557B

secondary

#AE7248

accent

#8645E3

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1F557B

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

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