#1B6383#1B6383

#1B6383 is a mid, moderate cyan. Relative luminance 0.108; OKLCH L 47.2% C 0.085 H 232.4°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B6383
RGB	rgb(27, 99, 131)
HSL	hsl(198, 66%, 31%)
HSV	hsv(198, 79%, 51%)
CMYK	cmyk(79.4%, 24.4%, 0%, 48.6%)
CIE-LAB	lab(39.23, -10.10, -24.02)
CIE-LCH	lch(39.23, 26.05, 247.20°)
OKLab	oklab(47.17% -0.0522 -0.0676)
OKLCH	oklch(47.17% 0.085 232.4)
XYZ	xyz(9.0089, 10.7943, 23.0770)
Luminance	0.1080 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B6383 #833B1B

analogous

#1B836F #1B6383 #1B2F83

triadic

#1B6383 #831B63 #63831B

tetradic

#1B6383 #6F1B83 #833B1B #2F831B

square

#1B6383 #6F1B83 #833B1B #2F831B

split-complementary

#1B6383 #831B2F #836F1B

monochromatic

#06161E #113D50 #1B6383 #2589B6 #41A9D8

Accessibility & contrast

On white

6.65

#1B6383 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#1B6383 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B6383

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B6383	#FFFFFF	#000000	##FFFFFF
##1B6383	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#536285

Deuteranopia (green-blind)

#455883

Tritanopia (blue-blind)

#006C6E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #1b6383;
/* rgb */ color: rgb(27, 99, 131);
/* oklch */ color: oklch(47.2% 0.085 232.4);

Tailwind

colors: {
  custom: {
    50: '#698fa7',
    500: '#1b6383',
    950: '#000000',
  },
}

SCSS

$custom: #1b6383;
$custom-light: #698fa7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b6383",
  "rgb": {
    "r": 27,
    "g": 99,
    "b": 131
  },
  "hsl": {
    "h": 198.462,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.47167,
    "c": 0.08541,
    "h": 232.4
  },
  "luminance": 0.10795
}

Semantic roles & 50–950 ramp

primary

#1B6383

secondary

#B66743

accent

#733FE9

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#070C0F

muted

#7A7D7F

Preview Lab

Preview with #1B6383

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

Preview Lab → · Contrast checker → · Palette generator →