#2740AB#2740AB

#2740AB is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.173 H 267.9°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#2740AB
RGB	rgb(39, 64, 171)
HSL	hsl(229, 63%, 41%)
HSV	hsv(229, 77%, 67%)
CMYK	cmyk(77.2%, 62.6%, 0%, 32.9%)
CIE-LAB	lab(31.89, 29.76, -59.89)
CIE-LCH	lch(31.89, 66.87, 296.42°)
OKLab	oklab(42.44% -0.0065 -0.1731)
OKLCH	oklch(42.44% 0.173 267.9)
XYZ	xyz(10.0182, 7.0373, 39.3505)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2740AB #AB9227

analogous

#2782AB #2740AB #5027AB

triadic

#2740AB #AB2740 #40AB27

tetradic

#2740AB #AB2782 #AB9227 #27AB50

square

#2740AB #AB2782 #AB9227 #27AB50

split-complementary

#2740AB #AB5027 #82AB27

monochromatic

#101B47 #1C2D79 #2740AB #3D59D3 #6E84DE

Accessibility & contrast

On white

8.72

#2740AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#2740AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2740AB

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2740AB	#FFFFFF	#000000	##FFFFFF
##2740AB	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AE

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005C6F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #2740ab;
/* rgb */ color: rgb(39, 64, 171);
/* oklch */ color: oklch(42.4% 0.173 267.9);

Tailwind

colors: {
  custom: {
    50: '#7674c5',
    500: '#2740ab',
    950: '#000000',
  },
}

SCSS

$custom: #2740ab;
$custom-light: #7674c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2740ab",
  "rgb": {
    "r": 39,
    "g": 64,
    "b": 171
  },
  "hsl": {
    "h": 228.636,
    "s": 62.857,
    "l": 41.176
  },
  "oklch": {
    "l": 0.42435,
    "c": 0.17327,
    "h": 267.9
  },
  "luminance": 0.07038
}

Semantic roles & 50–950 ramp

primary

#2740AB

secondary

#C5B369

accent

#C742E6

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2740AB

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

Preview Lab → · Contrast checker → · Palette generator →