#2B57BB#2B57BB

#2B57BB is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.5% C 0.165 H 263.5°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#2B57BB
RGB	rgb(43, 87, 187)
HSL	hsl(222, 63%, 45%)
HSV	hsv(222, 77%, 73%)
CMYK	cmyk(77%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(39.44, 21.08, -57.06)
CIE-LCH	lch(39.44, 60.83, 290.28°)
OKLab	oklab(48.54% -0.0186 -0.1644)
OKLCH	oklch(48.54% 0.165 263.5)
XYZ	xyz(13.3709, 10.9163, 48.4064)
Luminance	0.1092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B57BB #BB8F2B

analogous

#2B9FBB #2B57BB #472BBB

triadic

#2B57BB #BB2B57 #57BB2B

tetradic

#2B57BB #BB2B9F #BB8F2B #2BBB47

square

#2B57BB #BB2B9F #BB8F2B #2BBB47

split-complementary

#2B57BB #BB472B #9FBB2B

monochromatic

#142957 #204089 #2B57BB #4D77D6 #7F9DE2

Accessibility & contrast

On white

6.60

#2B57BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#2B57BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2B57BB

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B57BB	#FFFFFF	#000000	##FFFFFF
##2B57BB	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)

#0764BF

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #2b57bb;
/* rgb */ color: rgb(43, 87, 187);
/* oklch */ color: oklch(48.5% 0.165 263.5);

Tailwind

colors: {
  custom: {
    50: '#7a85d0',
    500: '#2b57bb',
    950: '#000000',
  },
}

SCSS

$custom: #2b57bb;
$custom-light: #7a85d0;
$custom-dark: #000000;

JSON

{
  "hex": "#2b57bb",
  "rgb": {
    "r": 43,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 221.667,
    "s": 62.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.48535,
    "c": 0.16546,
    "h": 263.5
  },
  "luminance": 0.10918
}

Semantic roles & 50–950 ramp

primary

#2B57BB

secondary

#CAB178

accent

#B442E6

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #2B57BB

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

Preview Lab → · Contrast checker → · Palette generator →