#4288C9#4288C9

#4288C9 is a mid, vivid cyan. Relative luminance 0.230; OKLCH L 61.1% C 0.122 H 249.0°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#4288C9
RGB	rgb(66, 136, 201)
HSL	hsl(209, 56%, 52%)
HSV	hsv(209, 67%, 79%)
CMYK	cmyk(67.2%, 32.3%, 0%, 21.2%)
CIE-LAB	lab(55.05, -1.19, -40.13)
CIE-LCH	lch(55.05, 40.14, 268.30°)
OKLab	oklab(61.12% -0.0437 -0.1136)
OKLCH	oklch(61.12% 0.122 249)
XYZ	xyz(21.5896, 22.9814, 58.5451)
Luminance	0.2298 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288C9 #C98342

analogous

#42C9C7 #4288C9 #4244C9

triadic

#4288C9 #C94288 #88C942

tetradic

#4288C9 #C742C9 #C98342 #44C942

square

#4288C9 #C742C9 #C98342 #44C942

split-complementary

#4288C9 #C94244 #C9C742

monochromatic

#204A70 #2E69A0 #4288C9 #72A6D7 #A1C4E4

Accessibility & contrast

On white

3.75

#4288C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.60

#4288C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288C9

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288C9	#FFFFFF	#000000	##000000
##4288C9	1.00	3.75	5.60	5.60
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.60	21.00	1.00	1.00
##000000	5.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B8BCC

Deuteranopia (green-blind)

#597EC8

Tritanopia (blue-blind)

#00979F

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #4288c9;
/* rgb */ color: rgb(66, 136, 201);
/* oklch */ color: oklch(61.1% 0.122 249.0);

Tailwind

colors: {
  custom: {
    50: '#84aad9',
    500: '#4288c9',
    950: '#000000',
  },
}

SCSS

$custom: #4288c9;
$custom-light: #84aad9;
$custom-dark: #000000;

JSON

{
  "hex": "#4288c9",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 201
  },
  "hsl": {
    "h": 208.889,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.61118,
    "c": 0.12173,
    "h": 249
  },
  "luminance": 0.22984
}

Semantic roles & 50–950 ramp

primary

#4288C9

secondary

#D1B296

accent

#9149DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288C9

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

Preview Lab → · Contrast checker → · Palette generator →