#5181DF#5181DF

#5181DF is a mid, vivid blue. Relative luminance 0.228; OKLCH L 61.5% C 0.152 H 262.4°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#5181DF
RGB	rgb(81, 129, 223)
HSL	hsl(220, 69%, 60%)
HSV	hsv(220, 64%, 87%)
CMYK	cmyk(63.7%, 42.2%, 0%, 12.5%)
CIE-LAB	lab(54.84, 13.12, -52.83)
CIE-LCH	lch(54.84, 54.43, 283.94°)
OKLab	oklab(61.5% -0.02 -0.1506)
OKLCH	oklch(61.5% 0.152 262.4)
XYZ	xyz(24.5582, 22.7753, 72.8996)
Luminance	0.2278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181DF #DFAF51

analogous

#51C8DF #5181DF #6851DF

triadic

#5181DF #DF5181 #81DF51

tetradic

#5181DF #DF51C8 #DFAF51 #51DF68

square

#5181DF #DF51C8 #DFAF51 #51DF68

split-complementary

#5181DF #DF6851 #C8DF51

monochromatic

#1C4799 #265ECD #5181DF #85A6E9 #B8CCF2

Accessibility & contrast

On white

3.78

#5181DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#5181DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181DF

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181DF	#FFFFFF	#000000	##000000
##5181DF	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#568AE3

Deuteranopia (green-blind)

#407DDD

Tritanopia (blue-blind)

#0096A5

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #5181df;
/* rgb */ color: rgb(81, 129, 223);
/* oklch */ color: oklch(61.5% 0.152 262.4);

Tailwind

colors: {
  custom: {
    50: '#8fa5e9',
    500: '#5181df',
    950: '#000000',
  },
}

SCSS

$custom: #5181df;
$custom-light: #8fa5e9;
$custom-dark: #000000;

JSON

{
  "hex": "#5181df",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 223
  },
  "hsl": {
    "h": 219.718,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.61495,
    "c": 0.15196,
    "h": 262.4
  },
  "luminance": 0.22778
}

Semantic roles & 50–950 ramp

primary

#5181DF

secondary

#E1CFAA

accent

#B03CEC

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #5181DF

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

Preview Lab → · Contrast checker → · Palette generator →