#4289CC#4289CC

#4289CC is a mid, vivid cyan. Relative luminance 0.234; OKLCH L 61.5% C 0.125 H 249.4°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#4289CC
RGB	rgb(66, 137, 204)
HSL	hsl(209, 58%, 53%)
HSV	hsv(209, 68%, 80%)
CMYK	cmyk(67.6%, 32.8%, 0%, 20%)
CIE-LAB	lab(55.49, -0.74, -41.14)
CIE-LCH	lch(55.49, 41.14, 268.97°)
OKLab	oklab(61.51% -0.0439 -0.1165)
OKLCH	oklch(61.51% 0.125 249.4)
XYZ	xyz(22.0874, 23.4069, 60.4690)
Luminance	0.2341 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289CC #CC8542

analogous

#42CCCA #4289CC #4244CC

triadic

#4289CC #CC4289 #89CC42

tetradic

#4289CC #CA42CC #CC8542 #44CC42

square

#4289CC #CA42CC #CC8542 #44CC42

split-complementary

#4289CC #CC4244 #CCCA42

monochromatic

#1F4B74 #2C6AA4 #4289CC #72A7D9 #A2C5E6

Accessibility & contrast

On white

3.70

#4289CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.68

#4289CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289CC

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289CC	#FFFFFF	#000000	##000000
##4289CC	1.00	3.70	5.68	5.68
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.68	21.00	1.00	1.00
##000000	5.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B8CCF

Deuteranopia (green-blind)

#587FCB

Tritanopia (blue-blind)

#0099A1

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4289cc;
/* rgb */ color: rgb(66, 137, 204);
/* oklch */ color: oklch(61.5% 0.125 249.4);

Tailwind

colors: {
  custom: {
    50: '#85abdc',
    500: '#4289cc',
    950: '#000000',
  },
}

SCSS

$custom: #4289cc;
$custom-light: #85abdc;
$custom-dark: #000000;

JSON

{
  "hex": "#4289cc",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 204
  },
  "hsl": {
    "h": 209.13,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.61508,
    "c": 0.12452,
    "h": 249.4
  },
  "luminance": 0.23409
}

Semantic roles & 50–950 ramp

primary

#4289CC

secondary

#D3B497

accent

#9247E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4289CC

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

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