#4289BB#4289BB

#4289BB is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.6% C 0.104 H 242.0°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#4289BB
RGB	rgb(66, 137, 187)
HSL	hsl(205, 48%, 50%)
HSV	hsv(205, 65%, 73%)
CMYK	cmyk(64.7%, 26.7%, 0%, 26.7%)
CIE-LAB	lab(54.69, -6.54, -32.73)
CIE-LCH	lch(54.69, 33.38, 258.70°)
OKLab	oklab(60.62% -0.049 -0.0921)
OKLCH	oklch(60.62% 0.104 242)
XYZ	xyz(20.1587, 22.6354, 50.3108)
Luminance	0.2264 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289BB #BB7442

analogous

#42BBB0 #4289BB #424DBB

triadic

#4289BB #BB4289 #89BB42

tetradic

#4289BB #B042BB #BB7442 #4DBB42

square

#4289BB #B042BB #BB7442 #4DBB42

split-complementary

#4289BB #BB424D #BBB042

monochromatic

#224761 #32688E #4289BB #6EA5CC #9CC1DC

Accessibility & contrast

On white

3.80

#4289BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#4289BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289BB

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289BB	#FFFFFF	#000000	##000000
##4289BB	1.00	3.80	5.53	5.53
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#728ABD

Deuteranopia (green-blind)

#627EBA

Tritanopia (blue-blind)

#00959A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4289bb;
/* rgb */ color: rgb(66, 137, 187);
/* oklch */ color: oklch(60.6% 0.104 242.0);

Tailwind

colors: {
  custom: {
    50: '#82abcf',
    500: '#4289bb',
    950: '#000000',
  },
}

SCSS

$custom: #4289bb;
$custom-light: #82abcf;
$custom-dark: #000000;

JSON

{
  "hex": "#4289bb",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 187
  },
  "hsl": {
    "h": 204.793,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.60621,
    "c": 0.10436,
    "h": 242
  },
  "luminance": 0.22637
}

Semantic roles & 50–950 ramp

primary

#4289BB

secondary

#C8A891

accent

#8850D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #4289BB

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

Preview Lab → · Contrast checker → · Palette generator →