#1B91B3#1B91B3

#1B91B3 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.1% C 0.108 H 223.4°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B91B3
RGB	rgb(27, 145, 179)
HSL	hsl(193, 74%, 40%)
HSV	hsv(193, 85%, 70%)
CMYK	cmyk(84.9%, 19%, 0%, 29.8%)
CIE-LAB	lab(55.82, -18.72, -26.49)
CIE-LCH	lch(55.82, 32.44, 234.76°)
OKLab	oklab(61.14% -0.0786 -0.0744)
OKLCH	oklch(61.14% 0.108 223.4)
XYZ	xyz(18.7106, 23.7361, 46.2345)
Luminance	0.2374 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B91B3 #B33D1B

analogous

#1BB389 #1B91B3 #1B45B3

triadic

#1B91B3 #B31B91 #91B31B

tetradic

#1B91B3 #891BB3 #B33D1B #45B31B

square

#1B91B3 #891BB3 #B33D1B #45B31B

split-complementary

#1B91B3 #B31B45 #B3891B

monochromatic

#0B3B49 #13667E #1B91B3 #2CB7DF #61C9E7

Accessibility & contrast

On white

3.65

#1B91B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#1B91B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1B91B3

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B91B3	#FFFFFF	#000000	##000000
##1B91B3	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB5

Deuteranopia (green-blind)

#6A80B3

Tritanopia (blue-blind)

#009B9C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #1b91b3;
/* rgb */ color: rgb(27, 145, 179);
/* oklch */ color: oklch(61.1% 0.108 223.4);

Tailwind

colors: {
  custom: {
    50: '#75b1c9',
    500: '#1b91b3',
    950: '#000000',
  },
}

SCSS

$custom: #1b91b3;
$custom-light: #75b1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b91b3",
  "rgb": {
    "r": 27,
    "g": 145,
    "b": 179
  },
  "hsl": {
    "h": 193.421,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.61138,
    "c": 0.10823,
    "h": 223.4
  },
  "luminance": 0.23738
}

Semantic roles & 50–950 ramp

primary

#1B91B3

secondary

#CC775E

accent

#6137F0

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #1B91B3

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

Preview Lab → · Contrast checker → · Palette generator →