#1C399F#1C399F

#1C399F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.5% C 0.169 H 266.2°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#1C399F
RGB	rgb(28, 57, 159)
HSL	hsl(227, 70%, 37%)
HSV	hsv(227, 82%, 62%)
CMYK	cmyk(82.4%, 64.2%, 0%, 37.6%)
CIE-LAB	lab(28.58, 28.77, -58.10)
CIE-LCH	lch(28.58, 64.83, 296.34°)
OKLab	oklab(39.53% -0.0113 -0.1682)
OKLCH	oklch(39.53% 0.169 266.2)
XYZ	xyz(8.1978, 5.6754, 33.4576)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C399F #9F821C

analogous

#1C7A9F #1C399F #411C9F

triadic

#1C399F #9F1C39 #399F1C

tetradic

#1C399F #9F1C7A #9F821C #1C9F41

square

#1C399F #9F1C7A #9F821C #1C9F41

split-complementary

#1C399F #9F411C #7A9F1C

monochromatic

#0A1437 #13266B #1C399F #254CD3 #5474E1

Accessibility & contrast

On white

9.84

#1C399F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1C399F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C399F

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C399F	#FFFFFF	#000000	##FFFFFF
##1C399F	1.00	9.84	2.14	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA2

Deuteranopia (green-blind)

#003D9D

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c399f;
/* rgb */ color: rgb(28, 57, 159);
/* oklch */ color: oklch(39.5% 0.169 266.2);

Tailwind

colors: {
  custom: {
    50: '#706fbc',
    500: '#1c399f',
    950: '#000000',
  },
}

SCSS

$custom: #1c399f;
$custom-light: #706fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c399f",
  "rgb": {
    "r": 28,
    "g": 57,
    "b": 159
  },
  "hsl": {
    "h": 226.718,
    "s": 70.053,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39532,
    "c": 0.16857,
    "h": 266.2
  },
  "luminance": 0.05676
}

Semantic roles & 50–950 ramp

primary

#1C399F

secondary

#C4AB53

accent

#C53BED

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1C399F

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

Preview Lab → · Contrast checker → · Palette generator →