#427CD9#427CD9

#427CD9 is a mid, vivid blue. Relative luminance 0.206; OKLCH L 59.4% C 0.155 H 259.5°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#427CD9
RGB	rgb(66, 124, 217)
HSL	hsl(217, 67%, 55%)
HSV	hsv(217, 70%, 85%)
CMYK	cmyk(69.6%, 42.9%, 0%, 14.9%)
CIE-LAB	lab(52.49, 11.67, -53.25)
CIE-LCH	lch(52.49, 54.51, 282.36°)
OKLab	oklab(59.39% -0.0283 -0.1522)
OKLCH	oklch(59.39% 0.155 259.5)
XYZ	xyz(21.9743, 20.5810, 68.4466)
Luminance	0.2058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427CD9 #D99F42

analogous

#42C7D9 #427CD9 #5342D9

triadic

#427CD9 #D9427C #7CD942

tetradic

#427CD9 #D942C7 #D99F42 #42D953

square

#427CD9 #D942C7 #D99F42 #42D953

split-complementary

#427CD9 #D95342 #C7D942

monochromatic

#1B4486 #255EB9 #427CD9 #759FE3 #A8C3ED

Accessibility & contrast

On white

4.10

#427CD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#427CD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427CD9

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427CD9	#FFFFFF	#000000	##000000
##427CD9	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F85DD

Deuteranopia (green-blind)

#3577D7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #427cd9;
/* rgb */ color: rgb(66, 124, 217);
/* oklch */ color: oklch(59.4% 0.155 259.5);

Tailwind

colors: {
  custom: {
    50: '#87a1e5',
    500: '#427cd9',
    950: '#000000',
  },
}

SCSS

$custom: #427cd9;
$custom-light: #87a1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#427cd9",
  "rgb": {
    "r": 66,
    "g": 124,
    "b": 217
  },
  "hsl": {
    "h": 216.954,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.59394,
    "c": 0.1548,
    "h": 259.5
  },
  "luminance": 0.20583
}

Semantic roles & 50–950 ramp

primary

#427CD9

secondary

#DBC39C

accent

#A83EE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #427CD9

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

Preview Lab → · Contrast checker → · Palette generator →