#1739A1#1739A1

#1739A1 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.6% C 0.172 H 265.0°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#1739A1
RGB	rgb(23, 57, 161)
HSL	hsl(225, 75%, 36%)
HSV	hsv(225, 86%, 63%)
CMYK	cmyk(85.7%, 64.6%, 0%, 36.9%)
CIE-LAB	lab(28.59, 29.15, -59.30)
CIE-LCH	lch(28.59, 66.08, 296.18°)
OKLab	oklab(39.55% -0.0149 -0.1718)
OKLCH	oklch(39.55% 0.172 265)
XYZ	xyz(8.2472, 5.6806, 34.3731)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1739A1 #A17F17

analogous

#177EA1 #1739A1 #3A17A1

triadic

#1739A1 #A11739 #39A117

tetradic

#1739A1 #A1177E #A17F17 #17A13A

square

#1739A1 #A1177E #A17F17 #17A13A

split-complementary

#1739A1 #A13A17 #7EA117

monochromatic

#081336 #0F266B #1739A1 #1F4CD7 #4D72E6

Accessibility & contrast

On white

9.83

#1739A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1739A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1739A1

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1739A1	#FFFFFF	#000000	##FFFFFF
##1739A1	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA4

Deuteranopia (green-blind)

#003D9F

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1739a1;
/* rgb */ color: rgb(23, 57, 161);
/* oklch */ color: oklch(39.6% 0.172 265.0);

Tailwind

colors: {
  custom: {
    50: '#706fbe',
    500: '#1739a1',
    950: '#000000',
  },
}

SCSS

$custom: #1739a1;
$custom-light: #706fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1739a1",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 161
  },
  "hsl": {
    "h": 225.217,
    "s": 75,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39551,
    "c": 0.17242,
    "h": 265
  },
  "luminance": 0.05682
}

Semantic roles & 50–950 ramp

primary

#1739A1

secondary

#C7A94C

accent

#C336F2

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1739A1

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

Preview Lab → · Contrast checker → · Palette generator →