#2A57B9#2A57B9

#2A57B9 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.3% C 0.163 H 263.1°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#2A57B9
RGB	rgb(42, 87, 185)
HSL	hsl(221, 63%, 45%)
HSV	hsv(221, 77%, 73%)
CMYK	cmyk(77.3%, 53%, 0%, 27.5%)
CIE-LAB	lab(39.26, 20.20, -56.18)
CIE-LCH	lch(39.26, 59.70, 289.78°)
OKLab	oklab(48.34% -0.0195 -0.1618)
OKLCH	oklch(48.34% 0.163 263.1)
XYZ	xyz(13.1169, 10.8099, 47.2848)
Luminance	0.1081 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2A57B9 #B98C2A

analogous

#2A9FB9 #2A57B9 #452AB9

triadic

#2A57B9 #B92A57 #57B92A

tetradic

#2A57B9 #B92A9F #B98C2A #2AB945

square

#2A57B9 #B92A9F #B98C2A #2AB945

split-complementary

#2A57B9 #B9452A #9FB92A

monochromatic

#132855 #1F4087 #2A57B9 #4A76D6 #7C9CE1

Accessibility & contrast

On white

6.64

#2A57B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#2A57B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2A57B9

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2A57B9	#FFFFFF	#000000	##FFFFFF
##2A57B9	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E63BC

Deuteranopia (green-blind)

#0056B7

Tritanopia (blue-blind)

#006F7F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #2a57b9;
/* rgb */ color: rgb(42, 87, 185);
/* oklch */ color: oklch(48.3% 0.163 263.1);

Tailwind

colors: {
  custom: {
    50: '#7985cf',
    500: '#2a57b9',
    950: '#000000',
  },
}

SCSS

$custom: #2a57b9;
$custom-light: #7985cf;
$custom-dark: #000000;

JSON

{
  "hex": "#2a57b9",
  "rgb": {
    "r": 42,
    "g": 87,
    "b": 185
  },
  "hsl": {
    "h": 221.119,
    "s": 62.996,
    "l": 44.51
  },
  "oklch": {
    "l": 0.48342,
    "c": 0.16302,
    "h": 263.1
  },
  "luminance": 0.10811
}

Semantic roles & 50–950 ramp

primary

#2A57B9

secondary

#CAAF75

accent

#B242E6

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #2A57B9

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

Preview Lab → · Contrast checker → · Palette generator →