#1C90AB#1C90AB

#1C90AB is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.5% C 0.103 H 218.5°. Best body text is #000000 at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#1C90AB
RGB	rgb(28, 144, 171)
HSL	hsl(191, 72%, 39%)
HSV	hsv(191, 84%, 67%)
CMYK	cmyk(83.6%, 15.8%, 0%, 32.9%)
CIE-LAB	lab(55.21, -20.87, -22.87)
CIE-LCH	lch(55.21, 30.96, 227.63°)
OKLab	oklab(60.54% -0.0805 -0.064)
OKLCH	oklch(60.54% 0.103 218.5)
XYZ	xyz(17.7997, 23.1314, 42.0469)
Luminance	0.2313 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C90AB #AB371C

analogous

#1CAB7F #1C90AB #1C49AB

triadic

#1C90AB #AB1C90 #90AB1C

tetradic

#1C90AB #7F1CAB #AB371C #49AB1C

square

#1C90AB #7F1CAB #AB371C #49AB1C

split-complementary

#1C90AB #AB1C49 #AB7F1C

monochromatic

#0B3742 #136476 #1C90AB #28BADC #5DCBE4

Accessibility & contrast

On white

3.73

#1C90AB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.63

#1C90AB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1C90AB

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C90AB	#FFFFFF	#000000	##000000
##1C90AB	1.00	3.73	5.63	5.63
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.63	21.00	1.00	1.00
##000000	5.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8CAC

Deuteranopia (green-blind)

#6D7EAB

Tritanopia (blue-blind)

#009999

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #1c90ab;
/* rgb */ color: rgb(28, 144, 171);
/* oklch */ color: oklch(60.5% 0.103 218.5);

Tailwind

colors: {
  custom: {
    50: '#74b0c4',
    500: '#1c90ab',
    950: '#000000',
  },
}

SCSS

$custom: #1c90ab;
$custom-light: #74b0c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c90ab",
  "rgb": {
    "r": 28,
    "g": 144,
    "b": 171
  },
  "hsl": {
    "h": 191.329,
    "s": 71.859,
    "l": 39.02
  },
  "oklch": {
    "l": 0.60542,
    "c": 0.10288,
    "h": 218.5
  },
  "luminance": 0.23134
}

Semantic roles & 50–950 ramp

primary

#1C90AB

secondary

#C96F5A

accent

#5B39EF

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #1C90AB

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

Preview Lab → · Contrast checker → · Palette generator →