#4387FF#4387FF

#4387FF is a light, vivid blue. Relative luminance 0.257; OKLCH L 64.2% C 0.192 H 260.8°. Best body text is #000000 at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#4387FF
RGB	rgb(67, 135, 255)
HSL	hsl(218, 100%, 63%)
HSV	hsv(218, 74%, 100%)
CMYK	cmyk(73.7%, 47.1%, 0%, 0%)
CIE-LAB	lab(57.79, 18.64, -65.90)
CIE-LCH	lch(57.79, 68.49, 285.80°)
OKLab	oklab(64.22% -0.0306 -0.1892)
OKLCH	oklch(64.22% 0.192 260.8)
XYZ	xyz(29.0222, 25.7380, 98.0267)
Luminance	0.2574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4387FF #FFBB43

analogous

#43E5FF #4387FF #5D43FF

triadic

#4387FF #FF4387 #87FF43

tetradic

#4387FF #FF43E5 #FFBB43 #43FF5D

square

#4387FF #FF43E5 #FFBB43 #43FF5D

split-complementary

#4387FF #FF5D43 #E5FF43

monochromatic

#0048C8 #0660FF #4387FF #80AEFF #BDD5FF

Accessibility & contrast

On white

3.42

#4387FF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.15

#4387FF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4387FF

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4387FF	#FFFFFF	#000000	##000000
##4387FF	1.00	3.42	6.15	6.15
#FFFFFF	3.42	1.00	21.00	21.00
#000000	6.15	21.00	1.00	1.00
##000000	6.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4594FF

Deuteranopia (green-blind)

#0483FD

Tritanopia (blue-blind)

#00A3B7

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #4387ff;
/* rgb */ color: rgb(67, 135, 255);
/* oklch */ color: oklch(64.2% 0.192 260.8);

Tailwind

colors: {
  custom: {
    50: '#8fa9ff',
    500: '#4387ff',
    950: '#000000',
  },
}

SCSS

$custom: #4387ff;
$custom-light: #8fa9ff;
$custom-dark: #000000;

JSON

{
  "hex": "#4387ff",
  "rgb": {
    "r": 67,
    "g": 135,
    "b": 255
  },
  "hsl": {
    "h": 218.298,
    "s": 100,
    "l": 63.137
  },
  "oklch": {
    "l": 0.64216,
    "c": 0.19167,
    "h": 260.8
  },
  "luminance": 0.25741
}

Semantic roles & 50–950 ramp

primary

#4387FF

secondary

#F1D8AD

accent

#9200E6

background

#F9FAFF

surface

#F2F4FF

border

#CCCED7

text

#0E0F18

muted

#7E7F86

Preview Lab

Preview with #4387FF

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

Preview Lab → · Contrast checker → · Palette generator →