#4288E1#4288E1

#4288E1 is a light, vivid cyan. Relative luminance 0.242; OKLCH L 62.5% C 0.152 H 255.7°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#4288E1
RGB	rgb(66, 136, 225)
HSL	hsl(214, 73%, 57%)
HSV	hsv(214, 71%, 88%)
CMYK	cmyk(70.7%, 39.6%, 0%, 11.8%)
CIE-LAB	lab(56.29, 7.21, -51.68)
CIE-LCH	lch(56.29, 52.18, 277.95°)
OKLab	oklab(62.49% -0.0376 -0.1474)
OKLCH	oklch(62.49% 0.152 255.7)
XYZ	xyz(24.6365, 24.2002, 74.5923)
Luminance	0.2420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288E1 #E19B42

analogous

#42D8E1 #4288E1 #4C42E1

triadic

#4288E1 #E14288 #88E142

tetradic

#4288E1 #E142D8 #E19B42 #42E14C

square

#4288E1 #E142D8 #E19B42 #42E14C

split-complementary

#4288E1 #E14C42 #D8E142

monochromatic

#174D92 #1F69C6 #4288E1 #77A9E9 #ACCBF2

Accessibility & contrast

On white

3.60

#4288E1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#4288E1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288E1

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288E1	#FFFFFF	#000000	##000000
##4288E1	1.00	3.60	5.84	5.84
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F8FE5

Deuteranopia (green-blind)

#4580DF

Tritanopia (blue-blind)

#009DA9

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #4288e1;
/* rgb */ color: rgb(66, 136, 225);
/* oklch */ color: oklch(62.5% 0.152 255.7);

Tailwind

colors: {
  custom: {
    50: '#89aaeb',
    500: '#4288e1',
    950: '#000000',
  },
}

SCSS

$custom: #4288e1;
$custom-light: #89aaeb;
$custom-dark: #000000;

JSON

{
  "hex": "#4288e1",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 225
  },
  "hsl": {
    "h": 213.585,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.62486,
    "c": 0.15212,
    "h": 255.7
  },
  "luminance": 0.24203
}

Semantic roles & 50–950 ramp

primary

#4288E1

secondary

#E0C39F

accent

#9F38EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4288E1

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

Preview Lab → · Contrast checker → · Palette generator →