#2640B1#2640B1

#2640B1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.9% C 0.181 H 267.6°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#2640B1
RGB	rgb(38, 64, 177)
HSL	hsl(229, 65%, 42%)
HSV	hsv(229, 79%, 69%)
CMYK	cmyk(78.5%, 63.8%, 0%, 30.6%)
CIE-LAB	lab(32.37, 31.91, -62.68)
CIE-LCH	lch(32.37, 70.33, 296.98°)
OKLab	oklab(42.94% -0.0075 -0.1813)
OKLCH	oklch(42.94% 0.181 267.6)
XYZ	xyz(10.5658, 7.2520, 42.4294)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2640B1 #B19726

analogous

#2686B1 #2640B1 #5226B1

triadic

#2640B1 #B12640 #40B126

tetradic

#2640B1 #B12686 #B19726 #26B152

square

#2640B1 #B12686 #B19726 #26B152

split-complementary

#2640B1 #B15226 #86B126

monochromatic

#101C4C #1B2E7F #2640B1 #3F5BD6 #7186E0

Accessibility & contrast

On white

8.57

#2640B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#2640B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2640B1

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2640B1	#FFFFFF	#000000	##FFFFFF
##2640B1	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005E72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #2640b1;
/* rgb */ color: rgb(38, 64, 177);
/* oklch */ color: oklch(42.9% 0.181 267.6);

Tailwind

colors: {
  custom: {
    50: '#7774c9',
    500: '#2640b1',
    950: '#000000',
  },
}

SCSS

$custom: #2640b1;
$custom-light: #7774c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2640b1",
  "rgb": {
    "r": 38,
    "g": 64,
    "b": 177
  },
  "hsl": {
    "h": 228.777,
    "s": 64.651,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42942,
    "c": 0.18149,
    "h": 267.6
  },
  "luminance": 0.07253
}

Semantic roles & 50–950 ramp

primary

#2640B1

secondary

#C7B66B

accent

#C840E8

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2640B1

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

Preview Lab → · Contrast checker → · Palette generator →