#4280DD#4280DD

#4280DD is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.5% C 0.156 H 258.4°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#4280DD
RGB	rgb(66, 128, 221)
HSL	hsl(216, 70%, 56%)
HSV	hsv(216, 70%, 87%)
CMYK	cmyk(70.1%, 42.1%, 0%, 13.3%)
CIE-LAB	lab(53.83, 10.64, -53.35)
CIE-LCH	lch(53.83, 54.40, 281.28°)
OKLab	oklab(60.51% -0.0312 -0.1524)
OKLCH	oklch(60.51% 0.156 258.4)
XYZ	xyz(23.0124, 21.8146, 71.3904)
Luminance	0.2182 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280DD #DD9F42

analogous

#42CEDD #4280DD #5242DD

triadic

#4280DD #DD4280 #80DD42

tetradic

#4280DD #DD42CE #DD9F42 #42DD52

square

#4280DD #DD42CE #DD9F42 #42DD52

split-complementary

#4280DD #DD5242 #CEDD42

monochromatic

#19478C #2261BF #4280DD #76A3E6 #AAC6F0

Accessibility & contrast

On white

3.92

#4280DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#4280DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280DD

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280DD	#FFFFFF	#000000	##000000
##4280DD	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5388E1

Deuteranopia (green-blind)

#397ADB

Tritanopia (blue-blind)

#0096A4

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4280dd;
/* rgb */ color: rgb(66, 128, 221);
/* oklch */ color: oklch(60.5% 0.156 258.4);

Tailwind

colors: {
  custom: {
    50: '#88a4e8',
    500: '#4280dd',
    950: '#000000',
  },
}

SCSS

$custom: #4280dd;
$custom-light: #88a4e8;
$custom-dark: #000000;

JSON

{
  "hex": "#4280dd",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 221
  },
  "hsl": {
    "h": 216,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.60506,
    "c": 0.1556,
    "h": 258.4
  },
  "luminance": 0.21817
}

Semantic roles & 50–950 ramp

primary

#4280DD

secondary

#DDC49D

accent

#A63BEC

background

#F9FAFE

surface

#F1F3FD

border

#CBCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4280DD

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

Preview Lab → · Contrast checker → · Palette generator →