#4289D1#4289D1

#4289D1 is a mid, vivid cyan. Relative luminance 0.237; OKLCH L 61.8% C 0.131 H 251.0°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#4289D1
RGB	rgb(66, 137, 209)
HSL	hsl(210, 61%, 54%)
HSV	hsv(210, 68%, 82%)
CMYK	cmyk(68.4%, 34.4%, 0%, 18%)
CIE-LAB	lab(55.74, 0.99, -43.57)
CIE-LCH	lch(55.74, 43.58, 271.31°)
OKLab	oklab(61.78% -0.0425 -0.1236)
OKLCH	oklch(61.78% 0.131 251)
XYZ	xyz(22.6968, 23.6506, 63.6781)
Luminance	0.2365 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289D1 #D18A42

analogous

#42D0D1 #4289D1 #4342D1

triadic

#4289D1 #D14289 #89D142

tetradic

#4289D1 #D142D0 #D18A42 #42D143

square

#4289D1 #D142D0 #D18A42 #42D143

split-complementary

#4289D1 #D14342 #D0D142

monochromatic

#1E4C7B #2A6AAC #4289D1 #73A8DD #A4C6E9

Accessibility & contrast

On white

3.66

#4289D1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#4289D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289D1

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289D1	#FFFFFF	#000000	##000000
##4289D1	1.00	3.66	5.73	5.73
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.73	21.00	1.00	1.00
##000000	5.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698DD4

Deuteranopia (green-blind)

#557FD0

Tritanopia (blue-blind)

#009AA3

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4289d1;
/* rgb */ color: rgb(66, 137, 209);
/* oklch */ color: oklch(61.8% 0.131 251.0);

Tailwind

colors: {
  custom: {
    50: '#86abdf',
    500: '#4289d1',
    950: '#000000',
  },
}

SCSS

$custom: #4289d1;
$custom-light: #86abdf;
$custom-dark: #000000;

JSON

{
  "hex": "#4289d1",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 209
  },
  "hsl": {
    "h": 210.21,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.61783,
    "c": 0.13074,
    "h": 251
  },
  "luminance": 0.23653
}

Semantic roles & 50–950 ramp

primary

#4289D1

secondary

#D6B899

accent

#9444E4

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4289D1

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

Preview Lab → · Contrast checker → · Palette generator →