#4290CB#4290CB

#4290CB is a light, moderate cyan. Relative luminance 0.254; OKLCH L 63.1% C 0.117 H 244.2°. Best body text is #000000 at 6.08:1 contrast (WCAG AA passes).

Color values

HEX	#4290CB
RGB	rgb(66, 144, 203)
HSL	hsl(206, 57%, 53%)
HSV	hsv(206, 67%, 80%)
CMYK	cmyk(67.5%, 29.1%, 0%, 20.4%)
CIE-LAB	lab(57.48, -5.15, -37.45)
CIE-LCH	lch(57.48, 37.80, 262.17°)
OKLab	oklab(63.06% -0.0512 -0.1057)
OKLCH	oklch(63.06% 0.117 244.2)
XYZ	xyz(22.9954, 25.4141, 60.1819)
Luminance	0.2542 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290CB #CB7D42

analogous

#42CBC1 #4290CB #424CCB

triadic

#4290CB #CB4290 #90CB42

tetradic

#4290CB #C142CB #CB7D42 #4CCB42

square

#4290CB #C142CB #CB7D42 #4CCB42

split-complementary

#4290CB #CB424C #CBC142

monochromatic

#204F73 #2D70A3 #4290CB #72ACD8 #A2C8E5

Accessibility & contrast

On white

3.45

#4290CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.08

#4290CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290CB

6.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290CB	#FFFFFF	#000000	##000000
##4290CB	1.00	3.45	6.08	6.08
#FFFFFF	3.45	1.00	21.00	21.00
#000000	6.08	21.00	1.00	1.00
##000000	6.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7591CE

Deuteranopia (green-blind)

#6384CA

Tritanopia (blue-blind)

#009EA5

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #4290cb;
/* rgb */ color: rgb(66, 144, 203);
/* oklch */ color: oklch(63.1% 0.117 244.2);

Tailwind

colors: {
  custom: {
    50: '#85b0db',
    500: '#4290cb',
    950: '#000000',
  },
}

SCSS

$custom: #4290cb;
$custom-light: #85b0db;
$custom-dark: #000000;

JSON

{
  "hex": "#4290cb",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 203
  },
  "hsl": {
    "h": 205.839,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.63059,
    "c": 0.11747,
    "h": 244.2
  },
  "luminance": 0.25417
}

Semantic roles & 50–950 ramp

primary

#4290CB

secondary

#D2B097

accent

#8948E0

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4290CB

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

Preview Lab → · Contrast checker → · Palette generator →