#427DDB#427DDB

#427DDB is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.7% C 0.156 H 259.4°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#427DDB
RGB	rgb(66, 125, 219)
HSL	hsl(217, 68%, 56%)
HSV	hsv(217, 70%, 86%)
CMYK	cmyk(69.9%, 42.9%, 0%, 14.1%)
CIE-LAB	lab(52.88, 11.77, -53.74)
CIE-LCH	lch(52.88, 55.02, 282.35°)
OKLab	oklab(59.74% -0.0289 -0.1536)
OKLCH	oklch(59.74% 0.156 259.4)
XYZ	xyz(22.3620, 20.9376, 69.8669)
Luminance	0.2094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427DDB #DBA042

analogous

#42C9DB #427DDB #5342DB

triadic

#427DDB #DB427D #7DDB42

tetradic

#427DDB #DB42C9 #DBA042 #42DB53

square

#427DDB #DB42C9 #DBA042 #42DB53

split-complementary

#427DDB #DB5342 #C9DB42

monochromatic

#1A4589 #245EBC #427DDB #75A0E5 #A9C4EF

Accessibility & contrast

On white

4.05

#427DDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#427DDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427DDB

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427DDB	#FFFFFF	#000000	##000000
##427DDB	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F86DF

Deuteranopia (green-blind)

#3578D9

Tritanopia (blue-blind)

#0093A1

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #427ddb;
/* rgb */ color: rgb(66, 125, 219);
/* oklch */ color: oklch(59.7% 0.156 259.4);

Tailwind

colors: {
  custom: {
    50: '#88a2e7',
    500: '#427ddb',
    950: '#000000',
  },
}

SCSS

$custom: #427ddb;
$custom-light: #88a2e7;
$custom-dark: #000000;

JSON

{
  "hex": "#427ddb",
  "rgb": {
    "r": 66,
    "g": 125,
    "b": 219
  },
  "hsl": {
    "h": 216.863,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.59736,
    "c": 0.15632,
    "h": 259.4
  },
  "luminance": 0.2094
}

Semantic roles & 50–950 ramp

primary

#427DDB

secondary

#DCC49D

accent

#A83DEB

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #427DDB

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

Preview Lab → · Contrast checker → · Palette generator →