#2B57B8#2B57B8

#2B57B8 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.3% C 0.161 H 263.3°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#2B57B8
RGB	rgb(43, 87, 184)
HSL	hsl(221, 62%, 45%)
HSV	hsv(221, 77%, 72%)
CMYK	cmyk(76.6%, 52.7%, 0%, 27.8%)
CIE-LAB	lab(39.22, 19.93, -55.65)
CIE-LCH	lch(39.22, 59.11, 289.71°)
OKLab	oklab(48.3% -0.0189 -0.1603)
OKLCH	oklch(48.3% 0.161 263.3)
XYZ	xyz(13.0531, 10.7892, 46.7327)
Luminance	0.1079 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B57B8 #B88C2B

analogous

#2B9EB8 #2B57B8 #462BB8

triadic

#2B57B8 #B82B57 #57B82B

tetradic

#2B57B8 #B82B9E #B88C2B #2BB846

square

#2B57B8 #B82B9E #B88C2B #2BB846

split-complementary

#2B57B8 #B8462B #9EB82B

monochromatic

#142855 #1F4086 #2B57B8 #4B76D5 #7D9CE1

Accessibility & contrast

On white

6.65

#2B57B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#2B57B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2B57B8

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B57B8	#FFFFFF	#000000	##FFFFFF
##2B57B8	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1163BB

Deuteranopia (green-blind)

#0056B6

Tritanopia (blue-blind)

#006F7F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #2b57b8;
/* rgb */ color: rgb(43, 87, 184);
/* oklch */ color: oklch(48.3% 0.161 263.3);

Tailwind

colors: {
  custom: {
    50: '#7985ce',
    500: '#2b57b8',
    950: '#000000',
  },
}

SCSS

$custom: #2b57b8;
$custom-light: #7985ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2b57b8",
  "rgb": {
    "r": 43,
    "g": 87,
    "b": 184
  },
  "hsl": {
    "h": 221.277,
    "s": 62.115,
    "l": 44.51
  },
  "oklch": {
    "l": 0.48302,
    "c": 0.16138,
    "h": 263.3
  },
  "luminance": 0.10791
}

Semantic roles & 50–950 ramp

primary

#2B57B8

secondary

#C9AF76

accent

#B243E5

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #2B57B8

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

Preview Lab → · Contrast checker → · Palette generator →