#4288D0#4288D0

#4288D0 is a mid, vivid cyan. Relative luminance 0.233; OKLCH L 61.5% C 0.130 H 251.3°. Best body text is #000000 at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#4288D0
RGB	rgb(66, 136, 208)
HSL	hsl(210, 60%, 54%)
HSV	hsv(210, 68%, 82%)
CMYK	cmyk(68.3%, 34.6%, 0%, 18.4%)
CIE-LAB	lab(55.40, 1.24, -43.54)
CIE-LCH	lch(55.40, 43.56, 271.63°)
OKLab	oklab(61.5% -0.0418 -0.1236)
OKLCH	oklch(61.5% 0.13 251.3)
XYZ	xyz(22.4319, 23.3183, 62.9810)
Luminance	0.2332 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288D0 #D08A42

analogous

#42CFD0 #4288D0 #4342D0

triadic

#4288D0 #D04288 #88D042

tetradic

#4288D0 #D042CF #D08A42 #42D043

square

#4288D0 #D042CF #D08A42 #42D043

split-complementary

#4288D0 #D04342 #CFD042

monochromatic

#1E4B79 #2A69AA #4288D0 #73A7DC #A4C6E8

Accessibility & contrast

On white

3.71

#4288D0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.66

#4288D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288D0

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288D0	#FFFFFF	#000000	##000000
##4288D0	1.00	3.71	5.66	5.66
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.66	21.00	1.00	1.00
##000000	5.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688CD3

Deuteranopia (green-blind)

#547FCF

Tritanopia (blue-blind)

#0099A2

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4288d0;
/* rgb */ color: rgb(66, 136, 208);
/* oklch */ color: oklch(61.5% 0.130 251.3);

Tailwind

colors: {
  custom: {
    50: '#86aadf',
    500: '#4288d0',
    950: '#000000',
  },
}

SCSS

$custom: #4288d0;
$custom-light: #86aadf;
$custom-dark: #000000;

JSON

{
  "hex": "#4288d0",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 208
  },
  "hsl": {
    "h": 210.423,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.61502,
    "c": 0.13043,
    "h": 251.3
  },
  "luminance": 0.23321
}

Semantic roles & 50–950 ramp

primary

#4288D0

secondary

#D5B799

accent

#9544E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288D0

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

Preview Lab → · Contrast checker → · Palette generator →