#4289B3#4289B3

#4289B3 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.2% C 0.096 H 237.3°. Best body text is #000000 at 5.46:1 contrast (WCAG AA passes).

Color values

HEX	#4289B3
RGB	rgb(66, 137, 179)
HSL	hsl(202, 46%, 48%)
HSV	hsv(202, 63%, 70%)
CMYK	cmyk(63.1%, 23.5%, 0%, 29.8%)
CIE-LAB	lab(54.35, -9.20, -28.70)
CIE-LCH	lch(54.35, 30.14, 252.23°)
OKLab	oklab(60.23% -0.0517 -0.0805)
OKLCH	oklch(60.23% 0.096 237.3)
XYZ	xyz(19.3260, 22.3023, 45.9254)
Luminance	0.2230 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289B3 #B36C42

analogous

#42B3A4 #4289B3 #4250B3

triadic

#4289B3 #B34289 #89B342

tetradic

#4289B3 #A442B3 #B36C42 #50B342

square

#4289B3 #A442B3 #B36C42 #50B342

split-complementary

#4289B3 #B34250 #B3A442

monochromatic

#21455A #326786 #4289B3 #6AA5C8 #97C0D9

Accessibility & contrast

On white

3.85

#4289B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.46

#4289B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289B3

5.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289B3	#FFFFFF	#000000	##000000
##4289B3	1.00	3.85	5.46	5.46
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.46	21.00	1.00	1.00
##000000	5.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7588B5

Deuteranopia (green-blind)

#667DB2

Tritanopia (blue-blind)

#009497

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #4289b3;
/* rgb */ color: rgb(66, 137, 179);
/* oklch */ color: oklch(60.2% 0.096 237.3);

Tailwind

colors: {
  custom: {
    50: '#81abca',
    500: '#4289b3',
    950: '#000000',
  },
}

SCSS

$custom: #4289b3;
$custom-light: #81abca;
$custom-dark: #000000;

JSON

{
  "hex": "#4289b3",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 179
  },
  "hsl": {
    "h": 202.301,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.6023,
    "c": 0.09569,
    "h": 237.3
  },
  "luminance": 0.22304
}

Semantic roles & 50–950 ramp

primary

#4289B3

secondary

#C4A18C

accent

#8352D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #4289B3

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

Preview Lab → · Contrast checker → · Palette generator →