#4288BB#4288BB

#4288BB is a mid, moderate cyan. Relative luminance 0.224; OKLCH L 60.4% C 0.105 H 242.8°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#4288BB
RGB	rgb(66, 136, 187)
HSL	hsl(205, 48%, 50%)
HSV	hsv(205, 65%, 73%)
CMYK	cmyk(64.7%, 27.3%, 0%, 26.7%)
CIE-LAB	lab(54.40, -5.96, -33.19)
CIE-LCH	lch(54.40, 33.72, 259.82°)
OKLab	oklab(60.39% -0.048 -0.0935)
OKLCH	oklch(60.39% 0.105 242.8)
XYZ	xyz(20.0172, 22.3524, 50.2636)
Luminance	0.2235 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288BB #BB7542

analogous

#42BBB1 #4288BB #424CBB

triadic

#4288BB #BB4288 #88BB42

tetradic

#4288BB #B142BB #BB7542 #4CBB42

square

#4288BB #B142BB #BB7542 #4CBB42

split-complementary

#4288BB #BB424C #BBB142

monochromatic

#224661 #32678E #4288BB #6EA4CC #9CC1DC

Accessibility & contrast

On white

3.84

#4288BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#4288BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288BB

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288BB	#FFFFFF	#000000	##000000
##4288BB	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7189BD

Deuteranopia (green-blind)

#617DBA

Tritanopia (blue-blind)

#00949A

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #4288bb;
/* rgb */ color: rgb(66, 136, 187);
/* oklch */ color: oklch(60.4% 0.105 242.8);

Tailwind

colors: {
  custom: {
    50: '#82aacf',
    500: '#4288bb',
    950: '#000000',
  },
}

SCSS

$custom: #4288bb;
$custom-light: #82aacf;
$custom-dark: #000000;

JSON

{
  "hex": "#4288bb",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 187
  },
  "hsl": {
    "h": 205.289,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.60388,
    "c": 0.10506,
    "h": 242.8
  },
  "luminance": 0.22354
}

Semantic roles & 50–950 ramp

primary

#4288BB

secondary

#C8A891

accent

#8950D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #4288BB

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

Preview Lab → · Contrast checker → · Palette generator →