#1F558F#1F558F

#1F558F is a dark, moderate cyan. Relative luminance 0.088; OKLCH L 44.5% C 0.111 H 253.0°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F558F
RGB	rgb(31, 85, 143)
HSL	hsl(211, 64%, 34%)
HSV	hsv(211, 78%, 56%)
CMYK	cmyk(78.3%, 40.6%, 0%, 43.9%)
CIE-LAB	lab(35.54, 3.79, -37.12)
CIE-LCH	lch(35.54, 37.31, 275.82°)
OKLab	oklab(44.49% -0.0324 -0.106)
OKLCH	oklch(44.49% 0.111 253)
XYZ	xyz(8.7696, 8.7705, 27.2119)
Luminance	0.0877 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F558F #8F591F

analogous

#1F8D8F #1F558F #211F8F

triadic

#1F558F #8F1F55 #558F1F

tetradic

#1F558F #8F1F8D #8F591F #1F8F21

square

#1F558F #8F1F8D #8F591F #1F8F21

split-complementary

#1F558F #8F211F #8D8F1F

monochromatic

#09192A #14375D #1F558F #2A73C1 #4F92D9

Accessibility & contrast

On white

7.62

#1F558F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#1F558F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F558F

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F558F	#FFFFFF	#000000	##FFFFFF
##1F558F	1.00	7.62	2.75	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#395991

Deuteranopia (green-blind)

#274F8E

Tritanopia (blue-blind)

#00636B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f558f;
/* rgb */ color: rgb(31, 85, 143);
/* oklch */ color: oklch(44.5% 0.111 253.0);

Tailwind

colors: {
  custom: {
    50: '#6c84b0',
    500: '#1f558f',
    950: '#000000',
  },
}

SCSS

$custom: #1f558f;
$custom-light: #6c84b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f558f",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 143
  },
  "hsl": {
    "h": 211.071,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.44488,
    "c": 0.11082,
    "h": 253
  },
  "luminance": 0.08771
}

Semantic roles & 50–950 ramp

primary

#1F558F

secondary

#BC874E

accent

#9740E7

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1F558F

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

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