#1C398B#1C398B

#1C398B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.141 H 265.3°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#1C398B
RGB	rgb(28, 57, 139)
HSL	hsl(224, 66%, 33%)
HSV	hsv(224, 80%, 55%)
CMYK	cmyk(79.9%, 59%, 0%, 45.5%)
CIE-LAB	lab(26.84, 20.87, -48.68)
CIE-LCH	lch(26.84, 52.97, 293.20°)
OKLab	oklab(37.7% -0.0116 -0.1406)
OKLCH	oklch(37.7% 0.141 265.3)
XYZ	xyz(6.6006, 5.0365, 25.0453)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C398B #8B6E1C

analogous

#1C718B #1C398B #361C8B

triadic

#1C398B #8B1C39 #398B1C

tetradic

#1C398B #8B1C71 #8B6E1C #1C8B36

square

#1C398B #8B1C71 #8B6E1C #1C8B36

split-complementary

#1C398B #8B361C #718B1C

monochromatic

#070F25 #122458 #1C398B #264EBE #476EDA

Accessibility & contrast

On white

10.46

#1C398B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1C398B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C398B

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C398B	#FFFFFF	#000000	##FFFFFF
##1C398B	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003A89

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c398b;
/* rgb */ color: rgb(28, 57, 139);
/* oklch */ color: oklch(37.7% 0.141 265.3);

Tailwind

colors: {
  custom: {
    50: '#6b6eae',
    500: '#1c398b',
    950: '#000000',
  },
}

SCSS

$custom: #1c398b;
$custom-light: #6b6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c398b",
  "rgb": {
    "r": 28,
    "g": 57,
    "b": 139
  },
  "hsl": {
    "h": 224.324,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37697,
    "c": 0.14105,
    "h": 265.3
  },
  "luminance": 0.05037
}

Semantic roles & 50–950 ramp

primary

#1C398B

secondary

#BC9D47

accent

#BD3EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C398B

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

Preview Lab → · Contrast checker → · Palette generator →