#3057B9#3057B9

#3057B9 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.6% C 0.161 H 264.7°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#3057B9
RGB	rgb(48, 87, 185)
HSL	hsl(223, 59%, 46%)
HSV	hsv(223, 74%, 73%)
CMYK	cmyk(74.1%, 53%, 0%, 27.5%)
CIE-LAB	lab(39.49, 20.93, -55.80)
CIE-LCH	lch(39.49, 59.59, 290.56°)
OKLab	oklab(48.58% -0.0149 -0.1606)
OKLCH	oklch(48.58% 0.161 264.7)
XYZ	xyz(13.3810, 10.9461, 47.2971)
Luminance	0.1095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3057B9 #B99230

analogous

#309BB9 #3057B9 #4E30B9

triadic

#3057B9 #B93057 #57B930

tetradic

#3057B9 #B9309B #B99230 #30B94E

square

#3057B9 #B9309B #B99230 #30B94E

split-complementary

#3057B9 #B94E30 #9BB930

monochromatic

#172958 #234088 #3057B9 #5478D3 #849EDF

Accessibility & contrast

On white

6.58

#3057B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3057B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3057B9

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3057B9	#FFFFFF	#000000	##FFFFFF
##3057B9	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1164BC

Deuteranopia (green-blind)

#0057B7

Tritanopia (blue-blind)

#006F7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3057b9;
/* rgb */ color: rgb(48, 87, 185);
/* oklch */ color: oklch(48.6% 0.161 264.7);

Tailwind

colors: {
  custom: {
    50: '#7b85cf',
    500: '#3057b9',
    950: '#000000',
  },
}

SCSS

$custom: #3057b9;
$custom-light: #7b85cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3057b9",
  "rgb": {
    "r": 48,
    "g": 87,
    "b": 185
  },
  "hsl": {
    "h": 222.92,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.48581,
    "c": 0.1613,
    "h": 264.7
  },
  "luminance": 0.10948
}

Semantic roles & 50–950 ramp

primary

#3057B9

secondary

#C9B37C

accent

#B646E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3057B9

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

Preview Lab → · Contrast checker → · Palette generator →