#4280CB#4280CB

#4280CB is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.4% C 0.132 H 254.5°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#4280CB
RGB	rgb(66, 128, 203)
HSL	hsl(213, 57%, 53%)
HSV	hsv(213, 67%, 80%)
CMYK	cmyk(67.5%, 36.9%, 0%, 20.4%)
CIE-LAB	lab(52.85, 4.27, -44.75)
CIE-LCH	lch(52.85, 44.95, 275.45°)
OKLab	oklab(59.42% -0.0352 -0.1272)
OKLCH	oklch(59.42% 0.132 254.5)
XYZ	xyz(20.7415, 20.9063, 59.4305)
Luminance	0.2091 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280CB #CB8D42

analogous

#42C4CB #4280CB #4942CB

triadic

#4280CB #CB4280 #80CB42

tetradic

#4280CB #CB42C4 #CB8D42 #42CB49

square

#4280CB #CB42C4 #CB8D42 #42CB49

split-complementary

#4280CB #CB4942 #C4CB42

monochromatic

#204573 #2D62A3 #4280CB #72A0D8 #A2C1E5

Accessibility & contrast

On white

4.05

#4280CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#4280CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280CB

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280CB	#FFFFFF	#000000	##000000
##4280CB	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E85CE

Deuteranopia (green-blind)

#4B78C9

Tritanopia (blue-blind)

#00919C

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #4280cb;
/* rgb */ color: rgb(66, 128, 203);
/* oklch */ color: oklch(59.4% 0.132 254.5);

Tailwind

colors: {
  custom: {
    50: '#85a4db',
    500: '#4280cb',
    950: '#000000',
  },
}

SCSS

$custom: #4280cb;
$custom-light: #85a4db;
$custom-dark: #000000;

JSON

{
  "hex": "#4280cb",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 203
  },
  "hsl": {
    "h": 212.847,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.59423,
    "c": 0.13198,
    "h": 254.5
  },
  "luminance": 0.20908
}

Semantic roles & 50–950 ramp

primary

#4280CB

secondary

#D2B797

accent

#9B48E0

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #4280CB

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

Preview Lab → · Contrast checker → · Palette generator →