#4289CE#4289CE

#4289CE is a mid, vivid cyan. Relative luminance 0.235; OKLCH L 61.6% C 0.127 H 250.1°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#4289CE
RGB	rgb(66, 137, 206)
HSL	hsl(210, 59%, 53%)
HSV	hsv(210, 68%, 81%)
CMYK	cmyk(68%, 33.5%, 0%, 19.2%)
CIE-LAB	lab(55.59, -0.05, -42.11)
CIE-LCH	lch(55.59, 42.11, 269.93°)
OKLab	oklab(61.62% -0.0433 -0.1194)
OKLCH	oklch(61.62% 0.127 250.1)
XYZ	xyz(22.3289, 23.5035, 61.7404)
Luminance	0.2351 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289CE #CE8742

analogous

#42CECD #4289CE #4243CE

triadic

#4289CE #CE4289 #89CE42

tetradic

#4289CE #CD42CE #CE8742 #43CE42

square

#4289CE #CD42CE #CE8742 #43CE42

split-complementary

#4289CE #CE4243 #CECD42

monochromatic

#1F4B77 #2B6AA7 #4289CE #73A7DB #A3C6E7

Accessibility & contrast

On white

3.68

#4289CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#4289CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289CE

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289CE	#FFFFFF	#000000	##000000
##4289CE	1.00	3.68	5.70	5.70
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.70	21.00	1.00	1.00
##000000	5.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A8CD1

Deuteranopia (green-blind)

#577FCD

Tritanopia (blue-blind)

#0099A2

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4289ce;
/* rgb */ color: rgb(66, 137, 206);
/* oklch */ color: oklch(61.6% 0.127 250.1);

Tailwind

colors: {
  custom: {
    50: '#85abdd',
    500: '#4289ce',
    950: '#000000',
  },
}

SCSS

$custom: #4289ce;
$custom-light: #85abdd;
$custom-dark: #000000;

JSON

{
  "hex": "#4289ce",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 206
  },
  "hsl": {
    "h": 209.571,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.61618,
    "c": 0.127,
    "h": 250.1
  },
  "luminance": 0.23506
}

Semantic roles & 50–950 ramp

primary

#4289CE

secondary

#D4B598

accent

#9346E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4289CE

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

Preview Lab → · Contrast checker → · Palette generator →