#4289E1#4289E1

#4289E1 is a light, vivid cyan. Relative luminance 0.245; OKLCH L 62.7% C 0.151 H 255.2°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#4289E1
RGB	rgb(66, 137, 225)
HSL	hsl(213, 73%, 57%)
HSV	hsv(213, 71%, 88%)
CMYK	cmyk(70.7%, 39.1%, 0%, 11.8%)
CIE-LAB	lab(56.57, 6.61, -51.23)
CIE-LCH	lch(56.57, 51.65, 277.36°)
OKLab	oklab(62.71% -0.0385 -0.1461)
OKLCH	oklch(62.71% 0.151 255.2)
XYZ	xyz(24.7780, 24.4831, 74.6394)
Luminance	0.2449 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289E1 #E19A42

analogous

#42D8E1 #4289E1 #4B42E1

triadic

#4289E1 #E14289 #89E142

tetradic

#4289E1 #E142D8 #E19A42 #42E14B

square

#4289E1 #E142D8 #E19A42 #42E14B

split-complementary

#4289E1 #E14B42 #D8E142

monochromatic

#174E92 #1F6AC6 #4289E1 #77AAE9 #ACCBF2

Accessibility & contrast

On white

3.56

#4289E1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#4289E1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289E1

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289E1	#FFFFFF	#000000	##000000
##4289E1	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6090E5

Deuteranopia (green-blind)

#4781DF

Tritanopia (blue-blind)

#009EAA

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #4289e1;
/* rgb */ color: rgb(66, 137, 225);
/* oklch */ color: oklch(62.7% 0.151 255.2);

Tailwind

colors: {
  custom: {
    50: '#89aaeb',
    500: '#4289e1',
    950: '#000000',
  },
}

SCSS

$custom: #4289e1;
$custom-light: #89aaeb;
$custom-dark: #000000;

JSON

{
  "hex": "#4289e1",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 225
  },
  "hsl": {
    "h": 213.208,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.62705,
    "c": 0.15106,
    "h": 255.2
  },
  "luminance": 0.24486
}

Semantic roles & 50–950 ramp

primary

#4289E1

secondary

#E0C39F

accent

#9E38EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289E1

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

Preview Lab → · Contrast checker → · Palette generator →