#5187EF#5187EF

#5187EF is a light, vivid blue. Relative luminance 0.253; OKLCH L 63.7% C 0.166 H 262.1°. Best body text is #000000 at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#5187EF
RGB	rgb(81, 135, 239)
HSL	hsl(219, 83%, 63%)
HSV	hsv(219, 66%, 94%)
CMYK	cmyk(66.1%, 43.5%, 0%, 6.3%)
CIE-LAB	lab(57.37, 14.97, -57.70)
CIE-LCH	lch(57.37, 59.61, 284.54°)
OKLab	oklab(63.74% -0.0229 -0.1649)
OKLCH	oklch(63.74% 0.166 262.1)
XYZ	xyz(27.6318, 25.3066, 85.0731)
Luminance	0.2531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5187EF #EFB951

analogous

#51D6EF #5187EF #6A51EF

triadic

#5187EF #EF5187 #87EF51

tetradic

#5187EF #EF51D6 #EFB951 #51EF6A

square

#5187EF #EF51D6 #EFB951 #51EF6A

split-complementary

#5187EF #EF6A51 #D6EF51

monochromatic

#1149B5 #1960EA #5187EF #89AEF4 #C1D4F9

Accessibility & contrast

On white

3.46

#5187EF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.06

#5187EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5187EF

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5187EF	#FFFFFF	#000000	##000000
##5187EF	1.00	3.46	6.06	6.06
#FFFFFF	3.46	1.00	21.00	21.00
#000000	6.06	21.00	1.00	1.00
##000000	6.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5592F3

Deuteranopia (green-blind)

#3A83ED

Tritanopia (blue-blind)

#009FAF

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #5187ef;
/* rgb */ color: rgb(81, 135, 239);
/* oklch */ color: oklch(63.7% 0.166 262.1);

Tailwind

colors: {
  custom: {
    50: '#91a9f5',
    500: '#5187ef',
    950: '#000000',
  },
}

SCSS

$custom: #5187ef;
$custom-light: #91a9f5;
$custom-dark: #000000;

JSON

{
  "hex": "#5187ef",
  "rgb": {
    "r": 81,
    "g": 135,
    "b": 239
  },
  "hsl": {
    "h": 219.494,
    "s": 83.158,
    "l": 62.745
  },
  "oklch": {
    "l": 0.6374,
    "c": 0.16645,
    "h": 262.1
  },
  "luminance": 0.25309
}

Semantic roles & 50–950 ramp

primary

#5187EF

secondary

#EAD7B1

accent

#9506E0

background

#F9FAFF

surface

#F2F4FE

border

#CCCED6

text

#0E0F17

muted

#7E7F85

Preview Lab

Preview with #5187EF

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

Preview Lab → · Contrast checker → · Palette generator →