#288FB3#288FB3

#288FB3 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 60.9% C 0.105 H 226.5°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#288FB3
RGB	rgb(40, 143, 179)
HSL	hsl(196, 63%, 43%)
HSV	hsv(196, 78%, 70%)
CMYK	cmyk(77.7%, 20.1%, 0%, 29.8%)
CIE-LAB	lab(55.43, -16.40, -27.08)
CIE-LCH	lch(55.43, 31.66, 238.80°)
OKLab	oklab(60.89% -0.0722 -0.076)
OKLCH	oklch(60.89% 0.105 226.5)
XYZ	xyz(18.8309, 23.3484, 46.1533)
Luminance	0.2335 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288FB3 #B34C28

analogous

#28B392 #288FB3 #2849B3

triadic

#288FB3 #B3288F #8FB328

tetradic

#288FB3 #9228B3 #B34C28 #49B328

square

#288FB3 #9228B3 #B34C28 #49B328

split-complementary

#288FB3 #B32849 #B39228

monochromatic

#123F4F #1D6781 #288FB3 #43AFD5 #75C4E0

Accessibility & contrast

On white

3.70

#288FB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#288FB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288FB3

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288FB3	#FFFFFF	#000000	##000000
##288FB3	1.00	3.70	5.67	5.67
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8CB5

Deuteranopia (green-blind)

#697FB3

Tritanopia (blue-blind)

#00999B

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #288fb3;
/* rgb */ color: rgb(40, 143, 179);
/* oklch */ color: oklch(60.9% 0.105 226.5);

Tailwind

colors: {
  custom: {
    50: '#78afca',
    500: '#288fb3',
    950: '#000000',
  },
}

SCSS

$custom: #288fb3;
$custom-light: #78afca;
$custom-dark: #000000;

JSON

{
  "hex": "#288fb3",
  "rgb": {
    "r": 40,
    "g": 143,
    "b": 179
  },
  "hsl": {
    "h": 195.54,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.60887,
    "c": 0.10485,
    "h": 226.5
  },
  "luminance": 0.23351
}

Semantic roles & 50–950 ramp

primary

#288FB3

secondary

#C8866F

accent

#6C41E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288FB3

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

Preview Lab → · Contrast checker → · Palette generator →