#515BB1#515BB1

#515BB1 is a mid, vivid blue. Relative luminance 0.124; OKLCH L 50.7% C 0.135 H 275.5°. Best body text is #FFFFFF at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#515BB1
RGB	rgb(81, 91, 177)
HSL	hsl(234, 38%, 51%)
HSV	hsv(234, 54%, 69%)
CMYK	cmyk(54.2%, 48.6%, 0%, 30.6%)
CIE-LAB	lab(41.85, 21.24, -47.20)
CIE-LCH	lch(41.85, 51.76, 294.23°)
OKLab	oklab(50.69% 0.0129 -0.1346)
OKLCH	oklch(50.69% 0.135 275.5)
XYZ	xyz(15.0677, 12.4048, 43.1868)
Luminance	0.1241 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515BB1 #B1A751

analogous

#518BB1 #515BB1 #7751B1

triadic

#515BB1 #B1515B #5BB151

tetradic

#515BB1 #B1518B #B1A751 #51B177

square

#515BB1 #B1518B #B1A751 #51B177

split-complementary

#515BB1 #B17751 #8BB151

monochromatic

#2A2F5E #3D4588 #515BB1 #7B83C4 #A6ABD7

Accessibility & contrast

On white

6.03

#515BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#515BB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515BB1

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515BB1	#FFFFFF	#000000	##FFFFFF
##515BB1	1.00	6.03	3.48	6.03
#FFFFFF	6.03	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3367B4

Deuteranopia (green-blind)

#275FAF

Tritanopia (blue-blind)

#236E7D

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #515bb1;
/* rgb */ color: rgb(81, 91, 177);
/* oklch */ color: oklch(50.7% 0.135 275.5);

Tailwind

colors: {
  custom: {
    50: '#8989c9',
    500: '#515bb1',
    950: '#000000',
  },
}

SCSS

$custom: #515bb1;
$custom-light: #8989c9;
$custom-dark: #000000;

JSON

{
  "hex": "#515bb1",
  "rgb": {
    "r": 81,
    "g": 91,
    "b": 177
  },
  "hsl": {
    "h": 233.75,
    "s": 38.095,
    "l": 50.588
  },
  "oklch": {
    "l": 0.50686,
    "c": 0.13518,
    "h": 275.5
  },
  "luminance": 0.12406
}

Semantic roles & 50–950 ramp

primary

#515BB1

secondary

#C4C09A

accent

#C25ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #515BB1

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

Preview Lab → · Contrast checker → · Palette generator →