#1C39A9#1C39A9

#1C39A9 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.5% C 0.182 H 266.4°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#1C39A9
RGB	rgb(28, 57, 169)
HSL	hsl(228, 72%, 39%)
HSV	hsv(228, 83%, 66%)
CMYK	cmyk(83.4%, 66.3%, 0%, 33.7%)
CIE-LAB	lab(29.50, 32.60, -62.62)
CIE-LCH	lch(29.50, 70.60, 297.51°)
OKLab	oklab(40.5% -0.0116 -0.1814)
OKLCH	oklch(40.5% 0.182 266.4)
XYZ	xyz(9.1009, 6.0366, 38.2139)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C39A9 #A98C1C

analogous

#1C7FA9 #1C39A9 #461CA9

triadic

#1C39A9 #A91C39 #39A91C

tetradic

#1C39A9 #A91C7F #A98C1C #1CA946

square

#1C39A9 #A91C7F #A98C1C #1CA946

split-complementary

#1C39A9 #A9461C #7FA91C

monochromatic

#0B1640 #132774 #1C39A9 #274CDB #5B78E4

Accessibility & contrast

On white

9.51

#1C39A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1C39A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C39A9

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C39A9	#FFFFFF	#000000	##FFFFFF
##1C39A9	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAD

Deuteranopia (green-blind)

#003FA7

Tritanopia (blue-blind)

#00576C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1c39a9;
/* rgb */ color: rgb(28, 57, 169);
/* oklch */ color: oklch(40.5% 0.182 266.4);

Tailwind

colors: {
  custom: {
    50: '#736fc4',
    500: '#1c39a9',
    950: '#000000',
  },
}

SCSS

$custom: #1c39a9;
$custom-light: #736fc4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c39a9",
  "rgb": {
    "r": 28,
    "g": 57,
    "b": 169
  },
  "hsl": {
    "h": 227.66,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40498,
    "c": 0.18177,
    "h": 266.4
  },
  "luminance": 0.06038
}

Semantic roles & 50–950 ramp

primary

#1C39A9

secondary

#C8B159

accent

#C939EE

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1C39A9

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

Preview Lab → · Contrast checker → · Palette generator →