#5191F3#5191F3

#5191F3 is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.1% C 0.161 H 258.7°. Best body text is #000000 at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#5191F3
RGB	rgb(81, 145, 243)
HSL	hsl(216, 87%, 64%)
HSV	hsv(216, 67%, 95%)
CMYK	cmyk(66.7%, 40.3%, 0%, 4.7%)
CIE-LAB	lab(60.31, 10.34, -55.23)
CIE-LCH	lch(60.31, 56.19, 280.60°)
OKLab	oklab(66.08% -0.0314 -0.1575)
OKLCH	oklch(66.08% 0.161 258.7)
XYZ	xyz(29.6906, 28.4682, 88.7068)
Luminance	0.2847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5191F3 #F3B351

analogous

#51E2F3 #5191F3 #6251F3

triadic

#5191F3 #F35191 #91F351

tetradic

#5191F3 #F351E2 #F3B351 #51F362

square

#5191F3 #F351E2 #F3B351 #51F362

split-complementary

#5191F3 #F36251 #E2F351

monochromatic

#0D52BD #186DEF #5191F3 #8AB5F7 #C4D9FB

Accessibility & contrast

On white

3.14

#5191F3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.69

#5191F3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5191F3

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5191F3	#FFFFFF	#000000	##000000
##5191F3	1.00	3.14	6.69	6.69
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.69	21.00	1.00	1.00
##000000	6.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#649AF7

Deuteranopia (green-blind)

#4B8AF1

Tritanopia (blue-blind)

#00A8B6

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #5191f3;
/* rgb */ color: rgb(81, 145, 243);
/* oklch */ color: oklch(66.1% 0.161 258.7);

Tailwind

colors: {
  custom: {
    50: '#92b0f7',
    500: '#5191f3',
    950: '#000000',
  },
}

SCSS

$custom: #5191f3;
$custom-light: #92b0f7;
$custom-dark: #000000;

JSON

{
  "hex": "#5191f3",
  "rgb": {
    "r": 81,
    "g": 145,
    "b": 243
  },
  "hsl": {
    "h": 216.296,
    "s": 87.097,
    "l": 63.529
  },
  "oklch": {
    "l": 0.66081,
    "c": 0.16057,
    "h": 258.7
  },
  "luminance": 0.28471
}

Semantic roles & 50–950 ramp

primary

#5191F3

secondary

#EDD6B3

accent

#8A02E4

background

#F9FAFF

surface

#F2F4FF

border

#CCCED7

text

#0E1017

muted

#7E7F85

Preview Lab

Preview with #5191F3

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

Preview Lab → · Contrast checker → · Palette generator →