#4280DC#4280DC

#4280DC is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.4% C 0.154 H 258.3°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#4280DC
RGB	rgb(66, 128, 220)
HSL	hsl(216, 69%, 56%)
HSV	hsv(216, 70%, 86%)
CMYK	cmyk(70%, 41.8%, 0%, 13.7%)
CIE-LAB	lab(53.77, 10.29, -52.88)
CIE-LCH	lch(53.77, 53.87, 281.01°)
OKLab	oklab(60.44% -0.0314 -0.151)
OKLCH	oklch(60.44% 0.154 258.3)
XYZ	xyz(22.8795, 21.7615, 70.6909)
Luminance	0.2176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280DC #DC9E42

analogous

#42CDDC #4280DC #5142DC

triadic

#4280DC #DC4280 #80DC42

tetradic

#4280DC #DC42CD #DC9E42 #42DC51

square

#4280DC #DC42CD #DC9E42 #42DC51

split-complementary

#4280DC #DC5142 #CDDC42

monochromatic

#1A478A #2361BE #4280DC #76A3E6 #A9C5EF

Accessibility & contrast

On white

3.92

#4280DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#4280DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280DC

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280DC	#FFFFFF	#000000	##000000
##4280DC	1.00	3.92	5.35	5.35
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.35	21.00	1.00	1.00
##000000	5.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5488E0

Deuteranopia (green-blind)

#3A7ADA

Tritanopia (blue-blind)

#0095A3

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #4280dc;
/* rgb */ color: rgb(66, 128, 220);
/* oklch */ color: oklch(60.4% 0.154 258.3);

Tailwind

colors: {
  custom: {
    50: '#88a4e7',
    500: '#4280dc',
    950: '#000000',
  },
}

SCSS

$custom: #4280dc;
$custom-light: #88a4e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4280dc",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 220
  },
  "hsl": {
    "h": 215.844,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.60444,
    "c": 0.15428,
    "h": 258.3
  },
  "luminance": 0.21764
}

Semantic roles & 50–950 ramp

primary

#4280DC

secondary

#DDC39D

accent

#A53CEC

background

#F9FAFE

surface

#F1F3FC

border

#CBCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4280DC

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

Preview Lab → · Contrast checker → · Palette generator →