#4287BB#4287BB

#4287BB is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 60.2% C 0.106 H 243.7°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#4287BB
RGB	rgb(66, 135, 187)
HSL	hsl(206, 48%, 50%)
HSV	hsv(206, 65%, 73%)
CMYK	cmyk(64.7%, 27.8%, 0%, 26.7%)
CIE-LAB	lab(54.10, -5.39, -33.66)
CIE-LCH	lch(54.10, 34.08, 260.91°)
OKLab	oklab(60.15% -0.0469 -0.0948)
OKLCH	oklch(60.15% 0.106 243.7)
XYZ	xyz(19.8770, 22.0720, 50.2169)
Luminance	0.2207 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287BB #BB7642

analogous

#42BBB3 #4287BB #424BBB

triadic

#4287BB #BB4287 #87BB42

tetradic

#4287BB #B342BB #BB7642 #4BBB42

square

#4287BB #B342BB #BB7642 #4BBB42

split-complementary

#4287BB #BB424B #BBB342

monochromatic

#224661 #32668E #4287BB #6EA4CC #9CC0DC

Accessibility & contrast

On white

3.88

#4287BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#4287BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287BB

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287BB	#FFFFFF	#000000	##000000
##4287BB	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7088BD

Deuteranopia (green-blind)

#5F7CBA

Tritanopia (blue-blind)

#009499

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4287bb;
/* rgb */ color: rgb(66, 135, 187);
/* oklch */ color: oklch(60.2% 0.106 243.7);

Tailwind

colors: {
  custom: {
    50: '#82a9cf',
    500: '#4287bb',
    950: '#000000',
  },
}

SCSS

$custom: #4287bb;
$custom-light: #82a9cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4287bb",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 187
  },
  "hsl": {
    "h": 205.785,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.60154,
    "c": 0.10578,
    "h": 243.7
  },
  "luminance": 0.22074
}

Semantic roles & 50–950 ramp

primary

#4287BB

secondary

#C8A991

accent

#8A50D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C0F14

muted

#7D7F82

Preview Lab

Preview with #4287BB

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

Preview Lab → · Contrast checker → · Palette generator →