#288BB2#288BB2

#288BB2 is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 59.9% C 0.105 H 229.4°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#288BB2
RGB	rgb(40, 139, 178)
HSL	hsl(197, 63%, 43%)
HSV	hsv(197, 78%, 70%)
CMYK	cmyk(77.5%, 21.9%, 0%, 30.2%)
CIE-LAB	lab(54.16, -14.55, -28.47)
CIE-LCH	lch(54.16, 31.98, 242.93°)
OKLab	oklab(59.86% -0.0687 -0.08)
OKLCH	oklch(59.86% 0.105 229.4)
XYZ	xyz(18.1403, 22.1285, 45.4260)
Luminance	0.2213 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288BB2 #B24F28

analogous

#28B294 #288BB2 #2846B2

triadic

#288BB2 #B2288B #8BB228

tetradic

#288BB2 #9428B2 #B24F28 #46B228

square

#288BB2 #9428B2 #B24F28 #46B228

split-complementary

#288BB2 #B22846 #B29428

monochromatic

#123D4E #1D6480 #288BB2 #43ABD5 #75C2E0

Accessibility & contrast

On white

3.87

#288BB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#288BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288BB2

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288BB2	#FFFFFF	#000000	##000000
##288BB2	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7789B4

Deuteranopia (green-blind)

#647CB1

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #288bb2;
/* rgb */ color: rgb(40, 139, 178);
/* oklch */ color: oklch(59.9% 0.105 229.4);

Tailwind

colors: {
  custom: {
    50: '#77adc9',
    500: '#288bb2',
    950: '#000000',
  },
}

SCSS

$custom: #288bb2;
$custom-light: #77adc9;
$custom-dark: #000000;

JSON

{
  "hex": "#288bb2",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 178
  },
  "hsl": {
    "h": 196.957,
    "s": 63.303,
    "l": 42.745
  },
  "oklch": {
    "l": 0.5986,
    "c": 0.10547,
    "h": 229.4
  },
  "luminance": 0.22131
}

Semantic roles & 50–950 ramp

primary

#288BB2

secondary

#C7886F

accent

#7041E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288BB2

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

Preview Lab → · Contrast checker → · Palette generator →