#515DB1#515DB1

#515DB1 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.1% C 0.132 H 274.6°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#515DB1
RGB	rgb(81, 93, 177)
HSL	hsl(233, 38%, 51%)
HSV	hsv(233, 54%, 69%)
CMYK	cmyk(54.2%, 47.5%, 0%, 30.6%)
CIE-LAB	lab(42.39, 19.98, -46.35)
CIE-LCH	lch(42.39, 50.47, 293.32°)
OKLab	oklab(51.09% 0.0107 -0.132)
OKLCH	oklch(51.09% 0.132 274.6)
XYZ	xyz(15.2410, 12.7513, 43.2446)
Luminance	0.1275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515DB1 #B1A551

analogous

#518DB1 #515DB1 #7551B1

triadic

#515DB1 #B1515D #5DB151

tetradic

#515DB1 #B1518D #B1A551 #51B175

square

#515DB1 #B1518D #B1A551 #51B175

split-complementary

#515DB1 #B17551 #8DB151

monochromatic

#2A305E #3D4688 #515DB1 #7B84C4 #A6ACD7

Accessibility & contrast

On white

5.91

#515DB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#515DB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515DB1

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515DB1	#FFFFFF	#000000	##FFFFFF
##515DB1	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3768B4

Deuteranopia (green-blind)

#2B60AF

Tritanopia (blue-blind)

#226F7E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #515db1;
/* rgb */ color: rgb(81, 93, 177);
/* oklch */ color: oklch(51.1% 0.132 274.6);

Tailwind

colors: {
  custom: {
    50: '#898ac9',
    500: '#515db1',
    950: '#000000',
  },
}

SCSS

$custom: #515db1;
$custom-light: #898ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#515db1",
  "rgb": {
    "r": 81,
    "g": 93,
    "b": 177
  },
  "hsl": {
    "h": 232.5,
    "s": 38.095,
    "l": 50.588
  },
  "oklch": {
    "l": 0.51091,
    "c": 0.13246,
    "h": 274.6
  },
  "luminance": 0.12752
}

Semantic roles & 50–950 ramp

primary

#515DB1

secondary

#C4BF9A

accent

#C05ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #515DB1

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

Preview Lab → · Contrast checker → · Palette generator →