#2A51B9#2A51B9

#2A51B9 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.1% C 0.170 H 264.9°. Best body text is #FFFFFF at 7.06:1 contrast (WCAG AA passes).

Color values

HEX	#2A51B9
RGB	rgb(42, 81, 185)
HSL	hsl(224, 63%, 45%)
HSV	hsv(224, 77%, 73%)
CMYK	cmyk(77.3%, 56.2%, 0%, 27.5%)
CIE-LAB	lab(37.62, 24.15, -58.84)
CIE-LCH	lch(37.62, 63.60, 292.32°)
OKLab	oklab(47.11% -0.0151 -0.1698)
OKLCH	oklch(47.11% 0.17 264.9)
XYZ	xyz(12.6511, 9.8784, 47.1295)
Luminance	0.0988 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2A51B9 #B9922A

analogous

#2A99B9 #2A51B9 #4A2AB9

triadic

#2A51B9 #B92A51 #51B92A

tetradic

#2A51B9 #B92A99 #B9922A #2AB94A

square

#2A51B9 #B92A99 #B9922A #2AB94A

split-complementary

#2A51B9 #B94A2A #99B92A

monochromatic

#132555 #1F3B87 #2A51B9 #4A70D6 #7C98E1

Accessibility & contrast

On white

7.06

#2A51B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.98

#2A51B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2A51B9

7.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2A51B9	#FFFFFF	#000000	##FFFFFF
##2A51B9	1.00	7.06	2.98	7.06
#FFFFFF	7.06	1.00	21.00	1.00
#000000	2.98	21.00	1.00	21.00
##FFFFFF	7.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBD

Deuteranopia (green-blind)

#0052B7

Tritanopia (blue-blind)

#006B7D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2a51b9;
/* rgb */ color: rgb(42, 81, 185);
/* oklch */ color: oklch(47.1% 0.170 264.9);

Tailwind

colors: {
  custom: {
    50: '#7981cf',
    500: '#2a51b9',
    950: '#000000',
  },
}

SCSS

$custom: #2a51b9;
$custom-light: #7981cf;
$custom-dark: #000000;

JSON

{
  "hex": "#2a51b9",
  "rgb": {
    "r": 42,
    "g": 81,
    "b": 185
  },
  "hsl": {
    "h": 223.636,
    "s": 62.996,
    "l": 44.51
  },
  "oklch": {
    "l": 0.47105,
    "c": 0.17043,
    "h": 264.9
  },
  "luminance": 0.0988
}

Semantic roles & 50–950 ramp

primary

#2A51B9

secondary

#CAB375

accent

#B942E6

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #2A51B9

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

Preview Lab → · Contrast checker → · Palette generator →