#4281DD#4281DD

#4281DD is a mid, vivid blue. Relative luminance 0.221; OKLCH L 60.7% C 0.154 H 258.0°. Best body text is #000000 at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#4281DD
RGB	rgb(66, 129, 221)
HSL	hsl(216, 70%, 56%)
HSV	hsv(216, 70%, 87%)
CMYK	cmyk(70.1%, 41.6%, 0%, 13.3%)
CIE-LAB	lab(54.11, 10.03, -52.91)
CIE-LCH	lch(54.11, 53.85, 280.74°)
OKLab	oklab(60.72% -0.0321 -0.1511)
OKLCH	oklch(60.72% 0.154 258)
XYZ	xyz(23.1434, 22.0768, 71.4341)
Luminance	0.2208 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4281DD #DD9E42

analogous

#42CFDD #4281DD #5142DD

triadic

#4281DD #DD4281 #81DD42

tetradic

#4281DD #DD42CF #DD9E42 #42DD51

square

#4281DD #DD42CF #DD9E42 #42DD51

split-complementary

#4281DD #DD5142 #CFDD42

monochromatic

#19488C #2262BF #4281DD #76A4E6 #AAC6F0

Accessibility & contrast

On white

3.88

#4281DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.42

#4281DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4281DD

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4281DD	#FFFFFF	#000000	##000000
##4281DD	1.00	3.88	5.42	5.42
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.42	21.00	1.00	1.00
##000000	5.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5589E1

Deuteranopia (green-blind)

#3B7BDB

Tritanopia (blue-blind)

#0096A4

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4281dd;
/* rgb */ color: rgb(66, 129, 221);
/* oklch */ color: oklch(60.7% 0.154 258.0);

Tailwind

colors: {
  custom: {
    50: '#88a5e8',
    500: '#4281dd',
    950: '#000000',
  },
}

SCSS

$custom: #4281dd;
$custom-light: #88a5e8;
$custom-dark: #000000;

JSON

{
  "hex": "#4281dd",
  "rgb": {
    "r": 66,
    "g": 129,
    "b": 221
  },
  "hsl": {
    "h": 215.613,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.60722,
    "c": 0.15449,
    "h": 258
  },
  "luminance": 0.22079
}

Semantic roles & 50–950 ramp

primary

#4281DD

secondary

#DDC39D

accent

#A43BEC

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4281DD

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

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