#289BB4#289BB4

#289BB4 is a light, moderate cyan. Relative luminance 0.272; OKLCH L 63.9% C 0.104 H 216.2°. Best body text is #000000 at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#289BB4
RGB	rgb(40, 155, 180)
HSL	hsl(191, 64%, 43%)
HSV	hsv(191, 78%, 71%)
CMYK	cmyk(77.8%, 13.9%, 0%, 29.4%)
CIE-LAB	lab(59.15, -22.45, -21.93)
CIE-LCH	lch(59.15, 31.38, 224.33°)
OKLab	oklab(63.89% -0.0835 -0.0612)
OKLCH	oklch(63.89% 0.104 216.2)
XYZ	xyz(20.8311, 27.1865, 47.3208)
Luminance	0.2719 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#289BB4 #B44128

analogous

#28B487 #289BB4 #2855B4

triadic

#289BB4 #B4289B #9BB428

tetradic

#289BB4 #8728B4 #B44128 #55B428

square

#289BB4 #8728B4 #B44128 #55B428

split-complementary

#289BB4 #B42855 #B48728

monochromatic

#124550 #1D7082 #289BB4 #44BBD5 #76CDE1

Accessibility & contrast

On white

3.26

#289BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.44

#289BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #289BB4

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##289BB4	#FFFFFF	#000000	##000000
##289BB4	1.00	3.26	6.44	6.44
#FFFFFF	3.26	1.00	21.00	21.00
#000000	6.44	21.00	1.00	1.00
##000000	6.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A96B5

Deuteranopia (green-blind)

#7788B4

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #289bb4;
/* rgb */ color: rgb(40, 155, 180);
/* oklch */ color: oklch(63.9% 0.104 216.2);

Tailwind

colors: {
  custom: {
    50: '#79b8ca',
    500: '#289bb4',
    950: '#000000',
  },
}

SCSS

$custom: #289bb4;
$custom-light: #79b8ca;
$custom-dark: #000000;

JSON

{
  "hex": "#289bb4",
  "rgb": {
    "r": 40,
    "g": 155,
    "b": 180
  },
  "hsl": {
    "h": 190.714,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.63885,
    "c": 0.10358,
    "h": 216.2
  },
  "luminance": 0.27189
}

Semantic roles & 50–950 ramp

primary

#289BB4

secondary

#C88070

accent

#5F41E7

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #289BB4

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

Preview Lab → · Contrast checker → · Palette generator →