#3057B8#3057B8

#3057B8 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.5% C 0.160 H 264.6°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#3057B8
RGB	rgb(48, 87, 184)
HSL	hsl(223, 59%, 45%)
HSV	hsv(223, 74%, 72%)
CMYK	cmyk(73.9%, 52.7%, 0%, 27.8%)
CIE-LAB	lab(39.42, 20.55, -55.33)
CIE-LCH	lch(39.42, 59.02, 290.38°)
OKLab	oklab(48.51% -0.015 -0.1592)
OKLCH	oklch(48.51% 0.16 264.6)
XYZ	xyz(13.2758, 10.9040, 46.7431)
Luminance	0.1090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3057B8 #B89130

analogous

#309BB8 #3057B8 #4D30B8

triadic

#3057B8 #B83057 #57B830

tetradic

#3057B8 #B8309B #B89130 #30B84D

square

#3057B8 #B8309B #B89130 #30B84D

split-complementary

#3057B8 #B84D30 #9BB830

monochromatic

#172957 #234087 #3057B8 #5377D2 #849EDF

Accessibility & contrast

On white

6.60

#3057B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3057B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3057B8

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3057B8	#FFFFFF	#000000	##FFFFFF
##3057B8	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1363BB

Deuteranopia (green-blind)

#0057B6

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3057b8;
/* rgb */ color: rgb(48, 87, 184);
/* oklch */ color: oklch(48.5% 0.160 264.6);

Tailwind

colors: {
  custom: {
    50: '#7b85ce',
    500: '#3057b8',
    950: '#000000',
  },
}

SCSS

$custom: #3057b8;
$custom-light: #7b85ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3057b8",
  "rgb": {
    "r": 48,
    "g": 87,
    "b": 184
  },
  "hsl": {
    "h": 222.794,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.48505,
    "c": 0.15994,
    "h": 264.6
  },
  "luminance": 0.10905
}

Semantic roles & 50–950 ramp

primary

#3057B8

secondary

#C8B27C

accent

#B546E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3057B8

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

Preview Lab → · Contrast checker → · Palette generator →