#1640B4#1640B4

#1640B4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.189 H 264.3°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#1640B4
RGB	rgb(22, 64, 180)
HSL	hsl(224, 78%, 40%)
HSV	hsv(224, 88%, 71%)
CMYK	cmyk(87.8%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(32.10, 31.80, -64.92)
CIE-LCH	lch(32.10, 72.30, 296.10°)
OKLab	oklab(42.67% -0.0189 -0.1882)
OKLCH	oklch(42.67% 0.189 264.3)
XYZ	xyz(10.3996, 7.1313, 43.9995)
Luminance	0.0713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1640B4 #B48A16

analogous

#168FB4 #1640B4 #3B16B4

triadic

#1640B4 #B41640 #40B416

tetradic

#1640B4 #B4168F #B48A16 #16B43B

square

#1640B4 #B4168F #B48A16 #16B43B

split-complementary

#1640B4 #B43B16 #8FB416

monochromatic

#091947 #0F2D7D #1640B4 #2356E4 #5A80EB

Accessibility & contrast

On white

8.65

#1640B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1640B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1640B4

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1640B4	#FFFFFF	#000000	##FFFFFF
##1640B4	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0044B2

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1640b4;
/* rgb */ color: rgb(22, 64, 180);
/* oklch */ color: oklch(42.7% 0.189 264.3);

Tailwind

colors: {
  custom: {
    50: '#7474cc',
    500: '#1640b4',
    950: '#000000',
  },
}

SCSS

$custom: #1640b4;
$custom-light: #7474cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1640b4",
  "rgb": {
    "r": 22,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 224.051,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.42673,
    "c": 0.1891,
    "h": 264.3
  },
  "luminance": 0.07133
}

Semantic roles & 50–950 ramp

primary

#1640B4

secondary

#CEAF58

accent

#C133F5

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1640B4

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

Preview Lab → · Contrast checker → · Palette generator →