#1738B4#1738B4

#1738B4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.3% C 0.198 H 265.6°. Best body text is #FFFFFF at 9.29:1 contrast (WCAG AA passes).

Color values

HEX	#1738B4
RGB	rgb(23, 56, 180)
HSL	hsl(227, 77%, 40%)
HSV	hsv(227, 87%, 71%)
CMYK	cmyk(87.2%, 68.9%, 0%, 29.4%)
CIE-LAB	lab(30.17, 37.06, -68.11)
CIE-LCH	lch(30.17, 77.54, 298.56°)
OKLab	oklab(41.26% -0.0151 -0.1975)
OKLCH	oklch(41.26% 0.198 265.6)
XYZ	xyz(10.0028, 6.3045, 43.8609)
Luminance	0.0631 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1738B4 #B49317

analogous

#1786B4 #1738B4 #4517B4

triadic

#1738B4 #B41738 #38B417

tetradic

#1738B4 #B41786 #B49317 #17B445

square

#1738B4 #B41786 #B49317 #17B445

split-complementary

#1738B4 #B44517 #86B417

monochromatic

#091647 #10277E #1738B4 #254DE3 #5B79EA

Accessibility & contrast

On white

9.29

#1738B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1738B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1738B4

9.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1738B4	#FFFFFF	#000000	##FFFFFF
##1738B4	1.00	9.29	2.26	9.29
#FFFFFF	9.29	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB8

Deuteranopia (green-blind)

#0040B2

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1738b4;
/* rgb */ color: rgb(23, 56, 180);
/* oklch */ color: oklch(41.3% 0.198 265.6);

Tailwind

colors: {
  custom: {
    50: '#756ecc',
    500: '#1738b4',
    950: '#000000',
  },
}

SCSS

$custom: #1738b4;
$custom-light: #756ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#1738b4",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 180
  },
  "hsl": {
    "h": 227.389,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.4126,
    "c": 0.19806,
    "h": 265.6
  },
  "luminance": 0.06306
}

Semantic roles & 50–950 ramp

primary

#1738B4

secondary

#CEB559

accent

#CC34F4

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1738B4

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

Preview Lab → · Contrast checker → · Palette generator →