#4288CA#4288CA

#4288CA is a mid, vivid cyan. Relative luminance 0.230; OKLCH L 61.2% C 0.123 H 249.3°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#4288CA
RGB	rgb(66, 136, 202)
HSL	hsl(209, 56%, 53%)
HSV	hsv(209, 67%, 79%)
CMYK	cmyk(67.3%, 32.7%, 0%, 20.8%)
CIE-LAB	lab(55.10, -0.84, -40.62)
CIE-LCH	lch(55.10, 40.63, 268.81°)
OKLab	oklab(61.17% -0.0434 -0.115)
OKLCH	oklch(61.17% 0.123 249.3)
XYZ	xyz(21.7076, 23.0286, 59.1666)
Luminance	0.2303 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288CA #CA8442

analogous

#42CAC8 #4288CA #4244CA

triadic

#4288CA #CA4288 #88CA42

tetradic

#4288CA #C842CA #CA8442 #44CA42

square

#4288CA #C842CA #CA8442 #44CA42

split-complementary

#4288CA #CA4244 #CAC842

monochromatic

#204A72 #2D69A2 #4288CA #72A6D7 #A2C4E5

Accessibility & contrast

On white

3.75

#4288CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#4288CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CA

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288CA	#FFFFFF	#000000	##000000
##4288CA	1.00	3.75	5.61	5.61
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.61	21.00	1.00	1.00
##000000	5.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B8BCD

Deuteranopia (green-blind)

#587EC9

Tritanopia (blue-blind)

#0098A0

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #4288ca;
/* rgb */ color: rgb(66, 136, 202);
/* oklch */ color: oklch(61.2% 0.123 249.3);

Tailwind

colors: {
  custom: {
    50: '#85aada',
    500: '#4288ca',
    950: '#000000',
  },
}

SCSS

$custom: #4288ca;
$custom-light: #85aada;
$custom-dark: #000000;

JSON

{
  "hex": "#4288ca",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 202
  },
  "hsl": {
    "h": 209.118,
    "s": 56.198,
    "l": 52.549
  },
  "oklch": {
    "l": 0.61172,
    "c": 0.12295,
    "h": 249.3
  },
  "luminance": 0.23031
}

Semantic roles & 50–950 ramp

primary

#4288CA

secondary

#D1B396

accent

#9248DF

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288CA

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

Preview Lab → · Contrast checker → · Palette generator →