#4289B7#4289B7

#4289B7 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.4% C 0.100 H 239.7°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#4289B7
RGB	rgb(66, 137, 183)
HSL	hsl(204, 47%, 49%)
HSV	hsv(204, 64%, 72%)
CMYK	cmyk(63.9%, 25.1%, 0%, 28.2%)
CIE-LAB	lab(54.52, -7.88, -30.72)
CIE-LCH	lch(54.52, 31.72, 255.62°)
OKLab	oklab(60.42% -0.0504 -0.0863)
OKLCH	oklch(60.42% 0.1 239.7)
XYZ	xyz(19.7364, 22.4665, 48.0869)
Luminance	0.2247 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289B7 #B77042

analogous

#42B7AB #4289B7 #424FB7

triadic

#4289B7 #B74289 #89B742

tetradic

#4289B7 #AB42B7 #B77042 #4FB742

square

#4289B7 #AB42B7 #B77042 #4FB742

split-complementary

#4289B7 #B7424F #B7AB42

monochromatic

#22465D #32678A #4289B7 #6CA5CA #99C1DA

Accessibility & contrast

On white

3.82

#4289B7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#4289B7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289B7

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289B7	#FFFFFF	#000000	##000000
##4289B7	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7489B9

Deuteranopia (green-blind)

#647DB6

Tritanopia (blue-blind)

#009599

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #4289b7;
/* rgb */ color: rgb(66, 137, 183);
/* oklch */ color: oklch(60.4% 0.100 239.7);

Tailwind

colors: {
  custom: {
    50: '#82abcc',
    500: '#4289b7',
    950: '#000000',
  },
}

SCSS

$custom: #4289b7;
$custom-light: #82abcc;
$custom-dark: #000000;

JSON

{
  "hex": "#4289b7",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 183
  },
  "hsl": {
    "h": 203.59,
    "s": 46.988,
    "l": 48.824
  },
  "oklch": {
    "l": 0.60424,
    "c": 0.09994,
    "h": 239.7
  },
  "luminance": 0.22468
}

Semantic roles & 50–950 ramp

primary

#4289B7

secondary

#C6A48F

accent

#8651D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #4289B7

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

Preview Lab → · Contrast checker → · Palette generator →