#4289CF#4289CF

#4289CF is a mid, vivid cyan. Relative luminance 0.236; OKLCH L 61.7% C 0.128 H 250.4°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).

Color values

HEX#4289CF
RGBrgb(66, 137, 207)
HSLhsl(210, 59%, 54%)
HSVhsv(210, 68%, 81%)
CMYKcmyk(68.1%, 33.8%, 0%, 18.8%)
CIE-LABlab(55.64, 0.30, -42.60)
CIE-LCHlch(55.64, 42.60, 270.40°)
OKLaboklab(61.67% -0.043 -0.1208)
OKLCHoklch(61.67% 0.128 250.4)
XYZxyz(22.4507, 23.5522, 62.3822)
Luminance0.2356 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4289CF #CF8842
analogous
#42CFCE #4289CF #4242CF
triadic
#4289CF #CF4289 #89CF42
tetradic
#4289CF #CE42CF #CF8842 #42CF42
square
#4289CF #CE42CF #CF8842 #42CF42
split-complementary
#4289CF #CF4242 #CFCE42
monochromatic
#1F4C78 #2B6AA9 #4289CF #73A7DB #A4C6E8

Accessibility & contrast

On white

3.68
#4289CF on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.71
#4289CF on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289CF
5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4289CF#FFFFFF#000000##000000
##4289CF1.003.685.715.71
#FFFFFF3.681.0021.0021.00
#0000005.7121.001.001.00
##0000005.7121.001.001.00

Color blindness preview

Protanopia (red-blind)
#6A8DD2
Deuteranopia (green-blind)
#567FCE
Tritanopia (blue-blind)
#0099A2
Achromatopsia (no color)
#858585

Design tokens & code

CSS
--color: #4289cf;
/* rgb */ color: rgb(66, 137, 207);
/* oklch */ color: oklch(61.7% 0.128 250.4);
Tailwind
colors: {
  custom: {
    50: '#85abde',
    500: '#4289cf',
    950: '#000000',
  },
}
SCSS
$custom: #4289cf;
$custom-light: #85abde;
$custom-dark: #000000;
JSON
{
  "hex": "#4289cf",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 207
  },
  "hsl": {
    "h": 209.787,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.61673,
    "c": 0.12824,
    "h": 250.4
  },
  "luminance": 0.23555
}

Semantic roles & 50–950 ramp

primary
#4289CF
secondary
#D5B698
accent
#9345E3
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4289CF

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

Preview Lab → · Contrast checker → · Palette generator →

#4289CF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva