#5178DD#5178DD

#5178DD is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.5% C 0.160 H 265.9°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#5178DD
RGB	rgb(81, 120, 221)
HSL	hsl(223, 67%, 59%)
HSV	hsv(223, 63%, 87%)
CMYK	cmyk(63.3%, 45.7%, 0%, 13.3%)
CIE-LAB	lab(52.29, 17.94, -55.79)
CIE-LCH	lch(52.29, 58.60, 287.83°)
OKLab	oklab(59.5% -0.0115 -0.1594)
OKLCH	oklch(59.5% 0.16 265.9)
XYZ	xyz(23.1565, 20.4006, 71.1100)
Luminance	0.2040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5178DD #DDB651

analogous

#51BEDD #5178DD #7051DD

triadic

#5178DD #DD5178 #78DD51

tetradic

#5178DD #DD51BE #DDB651 #51DD70

square

#5178DD #DD51BE #DDB651 #51DD70

split-complementary

#5178DD #DD7051 #BEDD51

monochromatic

#1D3F96 #2755C9 #5178DD #84A0E7 #B7C7F1

Accessibility & contrast

On white

4.13

#5178DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.08

#5178DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5178DD

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5178DD	#FFFFFF	#000000	##000000
##5178DD	1.00	4.13	5.08	5.08
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.08	21.00	1.00	1.00
##000000	5.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4683E1

Deuteranopia (green-blind)

#2E77DB

Tritanopia (blue-blind)

#008FA0

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #5178dd;
/* rgb */ color: rgb(81, 120, 221);
/* oklch */ color: oklch(59.5% 0.160 265.9);

Tailwind

colors: {
  custom: {
    50: '#8f9ee8',
    500: '#5178dd',
    950: '#000000',
  },
}

SCSS

$custom: #5178dd;
$custom-light: #8f9ee8;
$custom-dark: #000000;

JSON

{
  "hex": "#5178dd",
  "rgb": {
    "r": 81,
    "g": 120,
    "b": 221
  },
  "hsl": {
    "h": 223.286,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.59496,
    "c": 0.15987,
    "h": 265.9
  },
  "luminance": 0.20403
}

Semantic roles & 50–950 ramp

primary

#5178DD

secondary

#E0D1AA

accent

#BA3EEA

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #5178DD

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

Preview Lab → · Contrast checker → · Palette generator →