#2A57B8#2A57B8

#2A57B8 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.3% C 0.162 H 263.0°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#2A57B8
RGB	rgb(42, 87, 184)
HSL	hsl(221, 63%, 44%)
HSV	hsv(221, 77%, 72%)
CMYK	cmyk(77.2%, 52.7%, 0%, 27.8%)
CIE-LAB	lab(39.19, 19.82, -55.71)
CIE-LCH	lch(39.19, 59.13, 289.58°)
OKLab	oklab(48.26% -0.0196 -0.1605)
OKLCH	oklch(48.26% 0.162 263)
XYZ	xyz(13.0117, 10.7678, 46.7307)
Luminance	0.1077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2A57B8 #B88B2A

analogous

#2A9EB8 #2A57B8 #442AB8

triadic

#2A57B8 #B82A57 #57B82A

tetradic

#2A57B8 #B82A9E #B88B2A #2AB844

square

#2A57B8 #B82A9E #B88B2A #2AB844

split-complementary

#2A57B8 #B8442A #9EB82A

monochromatic

#132854 #1F3F86 #2A57B8 #4A76D6 #7B9CE1

Accessibility & contrast

On white

6.66

#2A57B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#2A57B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2A57B8

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2A57B8	#FFFFFF	#000000	##FFFFFF
##2A57B8	1.00	6.66	3.15	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.66	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: #2a57b8;
/* rgb */ color: rgb(42, 87, 184);
/* oklch */ color: oklch(48.3% 0.162 263.0);

Tailwind

colors: {
  custom: {
    50: '#7985ce',
    500: '#2a57b8',
    950: '#000000',
  },
}

SCSS

$custom: #2a57b8;
$custom-light: #7985ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2a57b8",
  "rgb": {
    "r": 42,
    "g": 87,
    "b": 184
  },
  "hsl": {
    "h": 220.986,
    "s": 62.832,
    "l": 44.314
  },
  "oklch": {
    "l": 0.48264,
    "c": 0.16167,
    "h": 263
  },
  "luminance": 0.10769
}

Semantic roles & 50–950 ramp

primary

#2A57B8

secondary

#C9AE75

accent

#B242E6

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #2A57B8

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

Preview Lab → · Contrast checker → · Palette generator →