#2640AB#2640AB

#2640AB is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.174 H 267.6°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#2640AB
RGB	rgb(38, 64, 171)
HSL	hsl(228, 64%, 41%)
HSV	hsv(228, 78%, 67%)
CMYK	cmyk(77.8%, 62.6%, 0%, 32.9%)
CIE-LAB	lab(31.85, 29.65, -59.96)
CIE-LCH	lch(31.85, 66.89, 296.31°)
OKLab	oklab(42.39% -0.0073 -0.1734)
OKLCH	oklch(42.39% 0.174 267.6)
XYZ	xyz(9.9809, 7.0180, 39.3488)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2640AB #AB9126

analogous

#2682AB #2640AB #4F26AB

triadic

#2640AB #AB2640 #40AB26

tetradic

#2640AB #AB2682 #AB9126 #26AB4F

square

#2640AB #AB2682 #AB9126 #26AB4F

split-complementary

#2640AB #AB4F26 #82AB26

monochromatic

#101B47 #1B2D79 #2640AB #3B59D3 #6D83DF

Accessibility & contrast

On white

8.74

#2640AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#2640AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2640AB

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2640AB	#FFFFFF	#000000	##FFFFFF
##2640AB	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	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: #2640ab;
/* rgb */ color: rgb(38, 64, 171);
/* oklch */ color: oklch(42.4% 0.174 267.6);

Tailwind

colors: {
  custom: {
    50: '#7674c5',
    500: '#2640ab',
    950: '#000000',
  },
}

SCSS

$custom: #2640ab;
$custom-light: #7674c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2640ab",
  "rgb": {
    "r": 38,
    "g": 64,
    "b": 171
  },
  "hsl": {
    "h": 228.271,
    "s": 63.636,
    "l": 40.98
  },
  "oklch": {
    "l": 0.42391,
    "c": 0.17354,
    "h": 267.6
  },
  "luminance": 0.07019
}

Semantic roles & 50–950 ramp

primary

#2640AB

secondary

#C5B368

accent

#C641E7

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2640AB

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

Preview Lab → · Contrast checker → · Palette generator →