#288DB3#288DB3

#288DB3 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.4% C 0.106 H 228.3°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#288DB3
RGB	rgb(40, 141, 179)
HSL	hsl(196, 63%, 43%)
HSV	hsv(196, 78%, 70%)
CMYK	cmyk(77.7%, 21.2%, 0%, 29.8%)
CIE-LAB	lab(54.82, -15.31, -28.03)
CIE-LCH	lch(54.82, 31.94, 241.36°)
OKLab	oklab(60.4% -0.0703 -0.0788)
OKLCH	oklch(60.4% 0.106 228.3)
XYZ	xyz(18.5333, 22.7533, 46.0541)
Luminance	0.2276 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288DB3 #B34E28

analogous

#28B393 #288DB3 #2847B3

triadic

#288DB3 #B3288D #8DB328

tetradic

#288DB3 #9328B3 #B34E28 #47B328

square

#288DB3 #9328B3 #B34E28 #47B328

split-complementary

#288DB3 #B32847 #B39328

monochromatic

#123E4F #1D6681 #288DB3 #43ADD5 #75C3E0

Accessibility & contrast

On white

3.78

#288DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#288DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288DB3

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288DB3	#FFFFFF	#000000	##000000
##288DB3	1.00	3.78	5.55	5.55
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798BB5

Deuteranopia (green-blind)

#677DB2

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #288db3;
/* rgb */ color: rgb(40, 141, 179);
/* oklch */ color: oklch(60.4% 0.106 228.3);

Tailwind

colors: {
  custom: {
    50: '#78aeca',
    500: '#288db3',
    950: '#000000',
  },
}

SCSS

$custom: #288db3;
$custom-light: #78aeca;
$custom-dark: #000000;

JSON

{
  "hex": "#288db3",
  "rgb": {
    "r": 40,
    "g": 141,
    "b": 179
  },
  "hsl": {
    "h": 196.403,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.60397,
    "c": 0.10555,
    "h": 228.3
  },
  "luminance": 0.22756
}

Semantic roles & 50–950 ramp

primary

#288DB3

secondary

#C8876F

accent

#6E41E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288DB3

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

Preview Lab → · Contrast checker → · Palette generator →