#1B558F#1B558F

#1B558F is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.4% C 0.112 H 252.0°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#1B558F
RGB	rgb(27, 85, 143)
HSL	hsl(210, 68%, 33%)
HSV	hsv(210, 81%, 56%)
CMYK	cmyk(81.1%, 40.6%, 0%, 43.9%)
CIE-LAB	lab(35.42, 3.30, -37.31)
CIE-LCH	lch(35.42, 37.45, 275.06°)
OKLab	oklab(44.37% -0.0347 -0.1066)
OKLCH	oklch(44.37% 0.112 252)
XYZ	xyz(8.6565, 8.7121, 27.2066)
Luminance	0.0871 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B558F #8F551B

analogous

#1B8F8F #1B558F #1B1B8F

triadic

#1B558F #8F1B55 #558F1B

tetradic

#1B558F #8F1B8F #8F551B #1B8F1B

square

#1B558F #8F1B8F #8F551B #1B8F1B

split-complementary

#1B558F #8F1B1B #8F8F1B

monochromatic

#081828 #11365C #1B558F #2574C2 #4892DC

Accessibility & contrast

On white

7.66

#1B558F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B558F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B558F

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B558F	#FFFFFF	#000000	##FFFFFF
##1B558F	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#395991

Deuteranopia (green-blind)

#264F8E

Tritanopia (blue-blind)

#00636B

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b558f;
/* rgb */ color: rgb(27, 85, 143);
/* oklch */ color: oklch(44.4% 0.112 252.0);

Tailwind

colors: {
  custom: {
    50: '#6b84b0',
    500: '#1b558f',
    950: '#000000',
  },
}

SCSS

$custom: #1b558f;
$custom-light: #6b84b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b558f",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 143
  },
  "hsl": {
    "h": 210,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.44366,
    "c": 0.11209,
    "h": 252
  },
  "luminance": 0.08713
}

Semantic roles & 50–950 ramp

primary

#1B558F

secondary

#BE8348

accent

#943DEB

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1B558F

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

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