#289AB5#289AB5

#289AB5 is a light, moderate cyan. Relative luminance 0.269; OKLCH L 63.7% C 0.104 H 217.9°. Best body text is #000000 at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#289AB5
RGB	rgb(40, 154, 181)
HSL	hsl(191, 64%, 43%)
HSV	hsv(191, 78%, 71%)
CMYK	cmyk(77.9%, 14.9%, 0%, 29%)
CIE-LAB	lab(58.88, -21.60, -22.91)
CIE-LCH	lch(58.88, 31.48, 226.69°)
OKLab	oklab(63.68% -0.0822 -0.064)
OKLCH	oklch(63.68% 0.104 217.9)
XYZ	xyz(20.7676, 26.8960, 47.8040)
Luminance	0.2690 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#289AB5 #B54328

analogous

#28B589 #289AB5 #2854B5

triadic

#289AB5 #B5289A #9AB528

tetradic

#289AB5 #8928B5 #B54328 #54B528

square

#289AB5 #8928B5 #B54328 #54B528

split-complementary

#289AB5 #B52854 #B58928

monochromatic

#124551 #1D6F83 #289AB5 #44BAD6 #77CCE1

Accessibility & contrast

On white

3.29

#289AB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.38

#289AB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #289AB5

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##289AB5	#FFFFFF	#000000	##000000
##289AB5	1.00	3.29	6.38	6.38
#FFFFFF	3.29	1.00	21.00	21.00
#000000	6.38	21.00	1.00	1.00
##000000	6.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8995B6

Deuteranopia (green-blind)

#7688B5

Tritanopia (blue-blind)

#00A3A3

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #289ab5;
/* rgb */ color: rgb(40, 154, 181);
/* oklch */ color: oklch(63.7% 0.104 217.9);

Tailwind

colors: {
  custom: {
    50: '#79b8cb',
    500: '#289ab5',
    950: '#000000',
  },
}

SCSS

$custom: #289ab5;
$custom-light: #79b8cb;
$custom-dark: #000000;

JSON

{
  "hex": "#289ab5",
  "rgb": {
    "r": 40,
    "g": 154,
    "b": 181
  },
  "hsl": {
    "h": 191.489,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.63681,
    "c": 0.10416,
    "h": 217.9
  },
  "luminance": 0.26899
}

Semantic roles & 50–950 ramp

primary

#289AB5

secondary

#C88170

accent

#6141E7

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #289AB5

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

Preview Lab → · Contrast checker → · Palette generator →