#4290DB#4290DB

#4290DB is a light, vivid cyan. Relative luminance 0.262; OKLCH L 63.9% C 0.137 H 250.1°. Best body text is #000000 at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#4290DB
RGB	rgb(66, 144, 219)
HSL	hsl(209, 68%, 56%)
HSV	hsv(209, 70%, 86%)
CMYK	cmyk(69.9%, 34.2%, 0%, 14.1%)
CIE-LAB	lab(58.24, 0.36, -45.22)
CIE-LCH	lch(58.24, 45.22, 270.45°)
OKLab	oklab(63.91% -0.0466 -0.1284)
OKLCH	oklch(63.91% 0.137 250.1)
XYZ	xyz(25.0014, 26.2165, 70.7468)
Luminance	0.2622 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290DB #DB8D42

analogous

#42DBDA #4290DB #4243DB

triadic

#4290DB #DB4290 #90DB42

tetradic

#4290DB #DA42DB #DB8D42 #43DB42

square

#4290DB #DA42DB #DB8D42 #43DB42

split-complementary

#4290DB #DB4243 #DBDA42

monochromatic

#1A5289 #2471BC #4290DB #75AEE5 #A9CCEF

Accessibility & contrast

On white

3.36

#4290DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.24

#4290DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290DB

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290DB	#FFFFFF	#000000	##000000
##4290DB	1.00	3.36	6.24	6.24
#FFFFFF	3.36	1.00	21.00	21.00
#000000	6.24	21.00	1.00	1.00
##000000	6.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E94DE

Deuteranopia (green-blind)

#5885DA

Tritanopia (blue-blind)

#00A2AB

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #4290db;
/* rgb */ color: rgb(66, 144, 219);
/* oklch */ color: oklch(63.9% 0.137 250.1);

Tailwind

colors: {
  custom: {
    50: '#87b0e6',
    500: '#4290db',
    950: '#000000',
  },
}

SCSS

$custom: #4290db;
$custom-light: #87b0e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4290db",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 219
  },
  "hsl": {
    "h": 209.412,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.63912,
    "c": 0.13657,
    "h": 250.1
  },
  "luminance": 0.26219
}

Semantic roles & 50–950 ramp

primary

#4290DB

secondary

#DCBC9D

accent

#923DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4290DB

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

Preview Lab → · Contrast checker → · Palette generator →