#4287D9#4287D9

#4287D9 is a mid, vivid cyan. Relative luminance 0.235; OKLCH L 61.8% C 0.143 H 254.3°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#4287D9
RGB	rgb(66, 135, 217)
HSL	hsl(213, 67%, 55%)
HSV	hsv(213, 70%, 85%)
CMYK	cmyk(69.6%, 37.8%, 0%, 14.9%)
CIE-LAB	lab(55.58, 4.99, -48.32)
CIE-LCH	lch(55.58, 48.58, 275.89°)
OKLab	oklab(61.79% -0.0385 -0.1376)
OKLCH	oklch(61.79% 0.143 254.3)
XYZ	xyz(23.4305, 23.4935, 68.9320)
Luminance	0.2350 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287D9 #D99442

analogous

#42D2D9 #4287D9 #4842D9

triadic

#4287D9 #D94287 #87D942

tetradic

#4287D9 #D942D2 #D99442 #42D948

square

#4287D9 #D942D2 #D99442 #42D948

split-complementary

#4287D9 #D94842 #D2D942

monochromatic

#1B4C86 #2569B9 #4287D9 #75A7E3 #A8C8ED

Accessibility & contrast

On white

3.68

#4287D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#4287D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287D9

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287D9	#FFFFFF	#000000	##000000
##4287D9	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)

#628DDC

Deuteranopia (green-blind)

#4B7FD7

Tritanopia (blue-blind)

#009AA5

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4287d9;
/* rgb */ color: rgb(66, 135, 217);
/* oklch */ color: oklch(61.8% 0.143 254.3);

Tailwind

colors: {
  custom: {
    50: '#87a9e5',
    500: '#4287d9',
    950: '#000000',
  },
}

SCSS

$custom: #4287d9;
$custom-light: #87a9e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4287d9",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 217
  },
  "hsl": {
    "h": 212.583,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.61793,
    "c": 0.14287,
    "h": 254.3
  },
  "luminance": 0.23496
}

Semantic roles & 50–950 ramp

primary

#4287D9

secondary

#DBBE9C

accent

#9B3EE9

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D0F16

muted

#7D7F84

Preview Lab

Preview with #4287D9

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

Preview Lab → · Contrast checker → · Palette generator →