#427BD9#427BD9

#427BD9 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.2% C 0.156 H 259.9°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#427BD9
RGB	rgb(66, 123, 217)
HSL	hsl(217, 67%, 55%)
HSV	hsv(217, 70%, 85%)
CMYK	cmyk(69.6%, 43.3%, 0%, 14.9%)
CIE-LAB	lab(52.21, 12.29, -53.69)
CIE-LCH	lch(52.21, 55.08, 282.89°)
OKLab	oklab(59.18% -0.0274 -0.1535)
OKLCH	oklch(59.18% 0.156 259.9)
XYZ	xyz(21.8496, 20.3316, 68.4051)
Luminance	0.2033 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BD9 #D9A042

analogous

#42C6D9 #427BD9 #5442D9

triadic

#427BD9 #D9427B #7BD942

tetradic

#427BD9 #D942C6 #D9A042 #42D954

square

#427BD9 #D942C6 #D9A042 #42D954

split-complementary

#427BD9 #D95442 #C6D942

monochromatic

#1B4386 #255DB9 #427BD9 #759FE3 #A8C2ED

Accessibility & contrast

On white

4.14

#427BD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#427BD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BD9

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BD9	#FFFFFF	#000000	##000000
##427BD9	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D84DD

Deuteranopia (green-blind)

#3276D7

Tritanopia (blue-blind)

#00919F

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #427bd9;
/* rgb */ color: rgb(66, 123, 217);
/* oklch */ color: oklch(59.2% 0.156 259.9);

Tailwind

colors: {
  custom: {
    50: '#87a0e5',
    500: '#427bd9',
    950: '#000000',
  },
}

SCSS

$custom: #427bd9;
$custom-light: #87a0e5;
$custom-dark: #000000;

JSON

{
  "hex": "#427bd9",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 217
  },
  "hsl": {
    "h": 217.351,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.5918,
    "c": 0.15593,
    "h": 259.9
  },
  "luminance": 0.20334
}

Semantic roles & 50–950 ramp

primary

#427BD9

secondary

#DBC39C

accent

#A93EE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #427BD9

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

Preview Lab → · Contrast checker → · Palette generator →