#4289BE#4289BE

#4289BE is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.8% C 0.108 H 243.5°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#4289BE
RGB	rgb(66, 137, 190)
HSL	hsl(206, 49%, 50%)
HSV	hsv(206, 65%, 75%)
CMYK	cmyk(65.3%, 27.9%, 0%, 25.5%)
CIE-LAB	lab(54.83, -5.53, -34.23)
CIE-LCH	lch(54.83, 34.67, 260.82°)
OKLab	oklab(60.77% -0.0481 -0.0965)
OKLCH	oklch(60.77% 0.108 243.5)
XYZ	xyz(20.4832, 22.7652, 52.0199)
Luminance	0.2277 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289BE #BE7742

analogous

#42BEB5 #4289BE #424BBE

triadic

#4289BE #BE4289 #89BE42

tetradic

#4289BE #B542BE #BE7742 #4BBE42

square

#4289BE #B542BE #BE7742 #4BBE42

split-complementary

#4289BE #BE424B #BEB542

monochromatic

#224863 #326891 #4289BE #70A5CE #9DC2DD

Accessibility & contrast

On white

3.78

#4289BE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#4289BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289BE

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289BE	#FFFFFF	#000000	##000000
##4289BE	1.00	3.78	5.55	5.55
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718AC0

Deuteranopia (green-blind)

#607EBD

Tritanopia (blue-blind)

#00969B

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4289be;
/* rgb */ color: rgb(66, 137, 190);
/* oklch */ color: oklch(60.8% 0.108 243.5);

Tailwind

colors: {
  custom: {
    50: '#83abd2',
    500: '#4289be',
    950: '#000000',
  },
}

SCSS

$custom: #4289be;
$custom-light: #83abd2;
$custom-dark: #000000;

JSON

{
  "hex": "#4289be",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 190
  },
  "hsl": {
    "h": 205.645,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.60773,
    "c": 0.10777,
    "h": 243.5
  },
  "luminance": 0.22767
}

Semantic roles & 50–950 ramp

primary

#4289BE

secondary

#CAAA92

accent

#8A4FD8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #4289BE

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

Preview Lab → · Contrast checker → · Palette generator →