#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
RGB	rgb(66, 137, 207)
HSL	hsl(210, 59%, 54%)
HSV	hsv(210, 68%, 81%)
CMYK	cmyk(68.1%, 33.8%, 0%, 18.8%)
CIE-LAB	lab(55.64, 0.30, -42.60)
CIE-LCH	lch(55.64, 42.60, 270.40°)
OKLab	oklab(61.67% -0.043 -0.1208)
OKLCH	oklch(61.67% 0.128 250.4)
XYZ	xyz(22.4507, 23.5522, 62.3822)
Luminance	0.2356 (WCAG relative)
Temperature	cool
Family	cyan

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
##4289CF	1.00	3.68	5.71	5.71
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.71	21.00	1.00	1.00
##000000	5.71	21.00	1.00	1.00

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.

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