#427DD9#427DD9

#427DD9 is a mid, vivid blue. Relative luminance 0.208; OKLCH L 59.6% C 0.154 H 259.0°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#427DD9
RGB	rgb(66, 125, 217)
HSL	hsl(217, 67%, 55%)
HSV	hsv(217, 70%, 85%)
CMYK	cmyk(69.6%, 42.4%, 0%, 14.9%)
CIE-LAB	lab(52.77, 11.05, -52.80)
CIE-LCH	lch(52.77, 53.95, 281.83°)
OKLab	oklab(59.61% -0.0292 -0.1509)
OKLCH	oklch(59.61% 0.154 259)
XYZ	xyz(22.1002, 20.8329, 68.4886)
Luminance	0.2084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427DD9 #D99E42

analogous

#42C9D9 #427DD9 #5242D9

triadic

#427DD9 #D9427D #7DD942

tetradic

#427DD9 #D942C9 #D99E42 #42D952

square

#427DD9 #D942C9 #D99E42 #42D952

split-complementary

#427DD9 #D95242 #C9D942

monochromatic

#1B4586 #255FB9 #427DD9 #75A0E3 #A8C3ED

Accessibility & contrast

On white

4.06

#427DD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#427DD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427DD9

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427DD9	#FFFFFF	#000000	##000000
##427DD9	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5185DD

Deuteranopia (green-blind)

#3777D7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #427dd9;
/* rgb */ color: rgb(66, 125, 217);
/* oklch */ color: oklch(59.6% 0.154 259.0);

Tailwind

colors: {
  custom: {
    50: '#87a2e5',
    500: '#427dd9',
    950: '#000000',
  },
}

SCSS

$custom: #427dd9;
$custom-light: #87a2e5;
$custom-dark: #000000;

JSON

{
  "hex": "#427dd9",
  "rgb": {
    "r": 66,
    "g": 125,
    "b": 217
  },
  "hsl": {
    "h": 216.556,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.59609,
    "c": 0.15367,
    "h": 259
  },
  "luminance": 0.20835
}

Semantic roles & 50–950 ramp

primary

#427DD9

secondary

#DBC29C

accent

#A73EE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #427DD9

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

Preview Lab → · Contrast checker → · Palette generator →