#4289D0#4289D0

#4289D0 is a mid, vivid cyan. Relative luminance 0.236; OKLCH L 61.7% C 0.129 H 250.7°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#4289D0
RGB	rgb(66, 137, 208)
HSL	hsl(210, 60%, 54%)
HSV	hsv(210, 68%, 82%)
CMYK	cmyk(68.3%, 34.1%, 0%, 18.4%)
CIE-LAB	lab(55.69, 0.65, -43.08)
CIE-LCH	lch(55.69, 43.09, 270.86°)
OKLab	oklab(61.73% -0.0428 -0.1222)
OKLCH	oklch(61.73% 0.129 250.7)
XYZ	xyz(22.5734, 23.6013, 63.0281)
Luminance	0.2360 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289D0 #D08942

analogous

#42D0D0 #4289D0 #4242D0

triadic

#4289D0 #D04289 #89D042

tetradic

#4289D0 #D042D0 #D08942 #42D042

square

#4289D0 #D042D0 #D08942 #42D042

split-complementary

#4289D0 #D04242 #D0D042

monochromatic

#1E4C79 #2A6AAA #4289D0 #73A8DC #A4C6E8

Accessibility & contrast

On white

3.67

#4289D0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#4289D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289D0

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289D0	#FFFFFF	#000000	##000000
##4289D0	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698DD3

Deuteranopia (green-blind)

#557FCF

Tritanopia (blue-blind)

#009AA3

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4289d0;
/* rgb */ color: rgb(66, 137, 208);
/* oklch */ color: oklch(61.7% 0.129 250.7);

Tailwind

colors: {
  custom: {
    50: '#86abdf',
    500: '#4289d0',
    950: '#000000',
  },
}

SCSS

$custom: #4289d0;
$custom-light: #86abdf;
$custom-dark: #000000;

JSON

{
  "hex": "#4289d0",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 208
  },
  "hsl": {
    "h": 210,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.61728,
    "c": 0.12948,
    "h": 250.7
  },
  "luminance": 0.23604
}

Semantic roles & 50–950 ramp

primary

#4289D0

secondary

#D5B799

accent

#9444E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4289D0

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

Preview Lab → · Contrast checker → · Palette generator →