#1B5B8D#1B5B8D

#1B5B8D is a mid, moderate cyan. Relative luminance 0.096; OKLCH L 45.7% C 0.103 H 246.7°. Best body text is #FFFFFF at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B5B8D
RGB	rgb(27, 91, 141)
HSL	hsl(206, 68%, 33%)
HSV	hsv(206, 81%, 55%)
CMYK	cmyk(80.9%, 35.5%, 0%, 44.7%)
CIE-LAB	lab(37.18, -1.35, -33.30)
CIE-LCH	lch(37.18, 33.33, 267.68°)
OKLab	oklab(45.71% -0.0408 -0.0947)
OKLCH	oklch(45.71% 0.103 246.7)
XYZ	xyz(8.9989, 9.6372, 26.5800)
Luminance	0.0964 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5B8D #8D4D1B

analogous

#1B8D86 #1B5B8D #1B228D

triadic

#1B5B8D #8D1B5B #5B8D1B

tetradic

#1B5B8D #861B8D #8D4D1B #228D1B

square

#1B5B8D #861B8D #8D4D1B #228D1B

split-complementary

#1B5B8D #8D1B22 #8D861B

monochromatic

#071926 #113A5A #1B5B8D #257CC0 #479ADC

Accessibility & contrast

On white

7.17

#1B5B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#1B5B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5B8D

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5B8D	#FFFFFF	#000000	##FFFFFF
##1B5B8D	1.00	7.17	2.93	7.17
#FFFFFF	7.17	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#445D8F

Deuteranopia (green-blind)

#33538C

Tritanopia (blue-blind)

#00676D

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b5b8d;
/* rgb */ color: rgb(27, 91, 141);
/* oklch */ color: oklch(45.7% 0.103 246.7);

Tailwind

colors: {
  custom: {
    50: '#6a89ae',
    500: '#1b5b8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b5b8d;
$custom-light: #6a89ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5b8d",
  "rgb": {
    "r": 27,
    "g": 91,
    "b": 141
  },
  "hsl": {
    "h": 206.316,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.45709,
    "c": 0.10316,
    "h": 246.7
  },
  "luminance": 0.09638
}

Semantic roles & 50–950 ramp

primary

#1B5B8D

secondary

#BD7B46

accent

#893DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1B5B8D

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

Preview Lab → · Contrast checker → · Palette generator →