#1740B4#1740B4

#1740B4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.189 H 264.4°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#1740B4
RGB	rgb(23, 64, 180)
HSL	hsl(224, 77%, 40%)
HSV	hsv(224, 87%, 71%)
CMYK	cmyk(87.2%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(32.13, 31.86, -64.88)
CIE-LCH	lch(32.13, 72.28, 296.15°)
OKLab	oklab(42.7% -0.0183 -0.188)
OKLCH	oklch(42.7% 0.189 264.4)
XYZ	xyz(10.4220, 7.1429, 44.0006)
Luminance	0.0714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1740B4 #B48B17

analogous

#178FB4 #1740B4 #3C17B4

triadic

#1740B4 #B41740 #40B417

tetradic

#1740B4 #B4178F #B48B17 #17B43C

square

#1740B4 #B4178F #B48B17 #17B43C

split-complementary

#1740B4 #B43C17 #8FB417

monochromatic

#091947 #102D7E #1740B4 #2557E3 #5B81EA

Accessibility & contrast

On white

8.65

#1740B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1740B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1740B4

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1740B4	#FFFFFF	#000000	##FFFFFF
##1740B4	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: #1740b4;
/* rgb */ color: rgb(23, 64, 180);
/* oklch */ color: oklch(42.7% 0.189 264.4);

Tailwind

colors: {
  custom: {
    50: '#7474cc',
    500: '#1740b4',
    950: '#000000',
  },
}

SCSS

$custom: #1740b4;
$custom-light: #7474cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1740b4",
  "rgb": {
    "r": 23,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 224.331,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.427,
    "c": 0.1889,
    "h": 264.4
  },
  "luminance": 0.07144
}

Semantic roles & 50–950 ramp

primary

#1740B4

secondary

#CEAF59

accent

#C234F4

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1740B4

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

Preview Lab → · Contrast checker → · Palette generator →