#5181EC#5181EC

#5181EC is a light, vivid blue. Relative luminance 0.235; OKLCH L 62.3% C 0.169 H 264.0°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#5181EC
RGB	rgb(81, 129, 236)
HSL	hsl(221, 80%, 62%)
HSV	hsv(221, 66%, 93%)
CMYK	cmyk(65.7%, 45.3%, 0%, 7.5%)
CIE-LAB	lab(55.59, 17.58, -58.90)
CIE-LCH	lch(55.59, 61.46, 286.62°)
OKLab	oklab(62.31% -0.0178 -0.1685)
OKLCH	oklch(62.31% 0.169 264)
XYZ	xyz(26.3786, 23.5034, 82.4871)
Luminance	0.2351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181EC #ECBC51

analogous

#51CFEC #5181EC #6E51EC

triadic

#5181EC #EC5181 #81EC51

tetradic

#5181EC #EC51CF #ECBC51 #51EC6E

square

#5181EC #EC51CF #ECBC51 #51EC6E

split-complementary

#5181EC #EC6E51 #CFEC51

monochromatic

#1344AF #1A59E6 #5181EC #88A9F2 #BFD1F8

Accessibility & contrast

On white

3.68

#5181EC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#5181EC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181EC

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181EC	#FFFFFF	#000000	##000000
##5181EC	1.00	3.68	5.70	5.70
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.70	21.00	1.00	1.00
##000000	5.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C8DF0

Deuteranopia (green-blind)

#2F7FEA

Tritanopia (blue-blind)

#009AAB

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #5181ec;
/* rgb */ color: rgb(81, 129, 236);
/* oklch */ color: oklch(62.3% 0.169 264.0);

Tailwind

colors: {
  custom: {
    50: '#91a5f3',
    500: '#5181ec',
    950: '#000000',
  },
}

SCSS

$custom: #5181ec;
$custom-light: #91a5f3;
$custom-dark: #000000;

JSON

{
  "hex": "#5181ec",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 236
  },
  "hsl": {
    "h": 221.419,
    "s": 80.311,
    "l": 62.157
  },
  "oklch": {
    "l": 0.62311,
    "c": 0.16941,
    "h": 264
  },
  "luminance": 0.23506
}

Semantic roles & 50–950 ramp

primary

#5181EC

secondary

#E9D7B0

accent

#9B09DD

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F17

muted

#7E7F85

Preview Lab

Preview with #5181EC

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

Preview Lab → · Contrast checker → · Palette generator →