#4289BF#4289BF

#4289BF is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.8% C 0.109 H 244.0°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#4289BF
RGB	rgb(66, 137, 191)
HSL	hsl(206, 49%, 50%)
HSV	hsv(206, 65%, 75%)
CMYK	cmyk(65.4%, 28.3%, 0%, 25.1%)
CIE-LAB	lab(54.88, -5.19, -34.73)
CIE-LCH	lch(54.88, 35.11, 261.50°)
OKLab	oklab(60.82% -0.0477 -0.0979)
OKLCH	oklch(60.82% 0.109 244)
XYZ	xyz(20.5929, 22.8091, 52.5974)
Luminance	0.2281 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289BF #BF7842

analogous

#42BFB6 #4289BF #424ABF

triadic

#4289BF #BF4289 #89BF42

tetradic

#4289BF #B642BF #BF7842 #4ABF42

square

#4289BF #B642BF #BF7842 #4ABF42

split-complementary

#4289BF #BF424A #BFB642

monochromatic

#224865 #326892 #4289BF #70A6CE #9DC2DE

Accessibility & contrast

On white

3.78

#4289BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#4289BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289BF

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289BF	#FFFFFF	#000000	##000000
##4289BF	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718AC1

Deuteranopia (green-blind)

#607EBE

Tritanopia (blue-blind)

#00969C

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4289bf;
/* rgb */ color: rgb(66, 137, 191);
/* oklch */ color: oklch(60.8% 0.109 244.0);

Tailwind

colors: {
  custom: {
    50: '#83abd2',
    500: '#4289bf',
    950: '#000000',
  },
}

SCSS

$custom: #4289bf;
$custom-light: #83abd2;
$custom-dark: #000000;

JSON

{
  "hex": "#4289bf",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 191
  },
  "hsl": {
    "h": 205.92,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.60823,
    "c": 0.10893,
    "h": 244
  },
  "luminance": 0.22811
}

Semantic roles & 50–950 ramp

primary

#4289BF

secondary

#CAAB93

accent

#8B4FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #4289BF

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

Preview Lab → · Contrast checker → · Palette generator →