#2A37A3#2A37A3

#2A37A3 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.2% C 0.173 H 270.8°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#2A37A3
RGB	rgb(42, 55, 163)
HSL	hsl(234, 59%, 40%)
HSV	hsv(234, 74%, 64%)
CMYK	cmyk(74.2%, 66.3%, 0%, 36.1%)
CIE-LAB	lab(29.08, 33.00, -59.68)
CIE-LCH	lch(29.08, 68.20, 298.94°)
OKLab	oklab(40.19% 0.0025 -0.1725)
OKLCH	oklch(40.19% 0.173 270.8)
XYZ	xyz(8.9296, 5.8680, 35.3053)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2A37A3 #A3962A

analogous

#2A73A3 #2A37A3 #5A2AA3

triadic

#2A37A3 #A32A37 #37A32A

tetradic

#2A37A3 #A32A73 #A3962A #2AA35A

square

#2A37A3 #A32A73 #A3962A #2AA35A

split-complementary

#2A37A3 #A35A2A #73A32A

monochromatic

#111642 #1D2772 #2A37A3 #3D4DCD #6E79DA

Accessibility & contrast

On white

9.66

#2A37A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#2A37A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2A37A3

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2A37A3	#FFFFFF	#000000	##FFFFFF
##2A37A3	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA6

Deuteranopia (green-blind)

#003FA1

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2a37a3;
/* rgb */ color: rgb(42, 55, 163);
/* oklch */ color: oklch(40.2% 0.173 270.8);

Tailwind

colors: {
  custom: {
    50: '#766ebf',
    500: '#2a37a3',
    950: '#000000',
  },
}

SCSS

$custom: #2a37a3;
$custom-light: #766ebf;
$custom-dark: #000000;

JSON

{
  "hex": "#2a37a3",
  "rgb": {
    "r": 42,
    "g": 55,
    "b": 163
  },
  "hsl": {
    "h": 233.554,
    "s": 59.024,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40186,
    "c": 0.17257,
    "h": 270.8
  },
  "luminance": 0.05869
}

Semantic roles & 50–950 ramp

primary

#2A37A3

secondary

#C0B768

accent

#D146E2

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2A37A3

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

Preview Lab → · Contrast checker → · Palette generator →