#3057BB#3057BB

#3057BB is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.7% C 0.164 H 264.8°. Best body text is #FFFFFF at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#3057BB
RGB	rgb(48, 87, 187)
HSL	hsl(223, 59%, 46%)
HSV	hsv(223, 74%, 73%)
CMYK	cmyk(74.3%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(39.63, 21.68, -56.74)
CIE-LCH	lch(39.63, 60.74, 290.91°)
OKLab	oklab(48.74% -0.0147 -0.1634)
OKLCH	oklch(48.74% 0.164 264.8)
XYZ	xyz(13.5936, 11.0311, 48.4169)
Luminance	0.1103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3057BB #BB9430

analogous

#309CBB #3057BB #4E30BB

triadic

#3057BB #BB3057 #57BB30

tetradic

#3057BB #BB309C #BB9430 #30BB4E

square

#3057BB #BB309C #BB9430 #30BB4E

split-complementary

#3057BB #BB4E30 #9CBB30

monochromatic

#172A5A #23408A #3057BB #5578D3 #869FE0

Accessibility & contrast

On white

6.55

#3057BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3057BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3057BB

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3057BB	#FFFFFF	#000000	##FFFFFF
##3057BB	1.00	6.55	3.21	6.55
#FFFFFF	6.55	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A64BF

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3057bb;
/* rgb */ color: rgb(48, 87, 187);
/* oklch */ color: oklch(48.7% 0.164 264.8);

Tailwind

colors: {
  custom: {
    50: '#7c85d0',
    500: '#3057bb',
    950: '#000000',
  },
}

SCSS

$custom: #3057bb;
$custom-light: #7c85d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3057bb",
  "rgb": {
    "r": 48,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 223.165,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.48735,
    "c": 0.16404,
    "h": 264.8
  },
  "luminance": 0.11033
}

Semantic roles & 50–950 ramp

primary

#3057BB

secondary

#C9B47D

accent

#B645E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3057BB

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

Preview Lab → · Contrast checker → · Palette generator →