#5183CF#5183CF

#5183CF is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.0% C 0.128 H 258.5°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#5183CF
RGB	rgb(81, 131, 207)
HSL	hsl(216, 57%, 56%)
HSV	hsv(216, 61%, 81%)
CMYK	cmyk(60.9%, 36.7%, 0%, 18.8%)
CIE-LAB	lab(54.54, 6.49, -44.30)
CIE-LCH	lch(54.54, 44.77, 278.33°)
OKLab	oklab(60.98% -0.0255 -0.1256)
OKLCH	oklch(60.98% 0.128 258.5)
XYZ	xyz(22.7681, 22.4849, 62.1595)
Luminance	0.2249 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5183CF #CF9D51

analogous

#51C2CF #5183CF #5E51CF

triadic

#5183CF #CF5183 #83CF51

tetradic

#5183CF #CF51C2 #CF9D51 #51CF5E

square

#5183CF #CF51C2 #CF9D51 #51CF5E

split-complementary

#5183CF #CF5E51 #C2CF51

monochromatic

#244982 #3164B2 #5183CF #81A5DC #B1C7E9

Accessibility & contrast

On white

3.82

#5183CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#5183CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5183CF

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5183CF	#FFFFFF	#000000	##000000
##5183CF	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6389D2

Deuteranopia (green-blind)

#517DCD

Tritanopia (blue-blind)

#00949F

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #5183cf;
/* rgb */ color: rgb(81, 131, 207);
/* oklch */ color: oklch(61.0% 0.128 258.5);

Tailwind

colors: {
  custom: {
    50: '#8ca6de',
    500: '#5183cf',
    950: '#000000',
  },
}

SCSS

$custom: #5183cf;
$custom-light: #8ca6de;
$custom-dark: #000000;

JSON

{
  "hex": "#5183cf",
  "rgb": {
    "r": 81,
    "g": 131,
    "b": 207
  },
  "hsl": {
    "h": 216.19,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.60982,
    "c": 0.12818,
    "h": 258.5
  },
  "luminance": 0.22487
}

Semantic roles & 50–950 ramp

primary

#5183CF

secondary

#D8C3A4

accent

#A448E0

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5183CF

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

Preview Lab → · Contrast checker → · Palette generator →