#427DDD#427DDD

#427DDD is a mid, vivid blue. Relative luminance 0.210; OKLCH L 59.9% C 0.159 H 259.7°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#427DDD
RGB	rgb(66, 125, 221)
HSL	hsl(217, 70%, 56%)
HSV	hsv(217, 70%, 87%)
CMYK	cmyk(70.1%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(53.00, 12.48, -54.68)
CIE-LCH	lch(53.00, 56.09, 282.86°)
OKLab	oklab(59.86% -0.0285 -0.1564)
OKLCH	oklch(59.86% 0.159 259.7)
XYZ	xyz(22.6268, 21.0435, 71.2619)
Luminance	0.2105 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427DDD #DDA242

analogous

#42CBDD #427DDD #5542DD

triadic

#427DDD #DD427D #7DDD42

tetradic

#427DDD #DD42CB #DDA242 #42DD55

square

#427DDD #DD42CB #DDA242 #42DD55

split-complementary

#427DDD #DD5542 #CBDD42

monochromatic

#19458C #225EBF #427DDD #76A1E6 #AAC4F0

Accessibility & contrast

On white

4.03

#427DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#427DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427DDD

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427DDD	#FFFFFF	#000000	##000000
##427DDD	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E86E1

Deuteranopia (green-blind)

#3278DB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #427ddd;
/* rgb */ color: rgb(66, 125, 221);
/* oklch */ color: oklch(59.9% 0.159 259.7);

Tailwind

colors: {
  custom: {
    50: '#88a2e8',
    500: '#427ddd',
    950: '#000000',
  },
}

SCSS

$custom: #427ddd;
$custom-light: #88a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#427ddd",
  "rgb": {
    "r": 66,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 217.161,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.59863,
    "c": 0.15897,
    "h": 259.7
  },
  "luminance": 0.21046
}

Semantic roles & 50–950 ramp

primary

#427DDD

secondary

#DDC59D

accent

#A93BEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #427DDD

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

Preview Lab → · Contrast checker → · Palette generator →