#2A37A4#2A37A4

#2A37A4 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.3% C 0.174 H 270.8°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#2A37A4
RGB	rgb(42, 55, 164)
HSL	hsl(234, 59%, 40%)
HSV	hsv(234, 74%, 64%)
CMYK	cmyk(74.4%, 66.5%, 0%, 35.7%)
CIE-LAB	lab(29.17, 33.37, -60.14)
CIE-LCH	lch(29.17, 68.77, 299.03°)
OKLab	oklab(40.28% 0.0025 -0.1739)
OKLCH	oklch(40.28% 0.174 270.8)
XYZ	xyz(9.0196, 5.9040, 35.7790)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2A37A4 #A4972A

analogous

#2A74A4 #2A37A4 #5A2AA4

triadic

#2A37A4 #A42A37 #37A42A

tetradic

#2A37A4 #A42A74 #A4972A #2AA45A

square

#2A37A4 #A42A74 #A4972A #2AA45A

split-complementary

#2A37A4 #A45A2A #74A42A

monochromatic

#111643 #1E2773 #2A37A4 #3E4DCD #6E7ADA

Accessibility & contrast

On white

9.63

#2A37A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#2A37A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2A37A4

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2A37A4	#FFFFFF	#000000	##FFFFFF
##2A37A4	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA7

Deuteranopia (green-blind)

#003FA2

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2a37a4;
/* rgb */ color: rgb(42, 55, 164);
/* oklch */ color: oklch(40.3% 0.174 270.8);

Tailwind

colors: {
  custom: {
    50: '#766ec0',
    500: '#2a37a4',
    950: '#000000',
  },
}

SCSS

$custom: #2a37a4;
$custom-light: #766ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#2a37a4",
  "rgb": {
    "r": 42,
    "g": 55,
    "b": 164
  },
  "hsl": {
    "h": 233.607,
    "s": 59.223,
    "l": 40.392
  },
  "oklch": {
    "l": 0.40281,
    "c": 0.1739,
    "h": 270.8
  },
  "luminance": 0.05905
}

Semantic roles & 50–950 ramp

primary

#2A37A4

secondary

#C1B869

accent

#D245E2

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2A37A4

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

Preview Lab → · Contrast checker → · Palette generator →