#1C388B#1C388B

#1C388B is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.142 H 265.6°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#1C388B
RGB	rgb(28, 56, 139)
HSL	hsl(225, 66%, 33%)
HSV	hsv(225, 80%, 55%)
CMYK	cmyk(79.9%, 59.7%, 0%, 45.5%)
CIE-LAB	lab(26.56, 21.56, -49.14)
CIE-LCH	lch(26.56, 53.66, 293.69°)
OKLab	oklab(37.49% -0.0109 -0.1419)
OKLCH	oklch(37.49% 0.142 265.6)
XYZ	xyz(6.5516, 4.9386, 25.0290)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C388B #8B6F1C

analogous

#1C6F8B #1C388B #381C8B

triadic

#1C388B #8B1C38 #388B1C

tetradic

#1C388B #8B1C6F #8B6F1C #1C8B38

square

#1C388B #8B1C6F #8B6F1C #1C8B38

split-complementary

#1C388B #8B381C #6F8B1C

monochromatic

#070F25 #122358 #1C388B #264DBE #476CDA

Accessibility & contrast

On white

10.56

#1C388B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1C388B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C388B

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C388B	#FFFFFF	#000000	##FFFFFF
##1C388B	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448E

Deuteranopia (green-blind)

#003A89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c388b;
/* rgb */ color: rgb(28, 56, 139);
/* oklch */ color: oklch(37.5% 0.142 265.6);

Tailwind

colors: {
  custom: {
    50: '#6b6eae',
    500: '#1c388b',
    950: '#000000',
  },
}

SCSS

$custom: #1c388b;
$custom-light: #6b6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c388b",
  "rgb": {
    "r": 28,
    "g": 56,
    "b": 139
  },
  "hsl": {
    "h": 224.865,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37488,
    "c": 0.14234,
    "h": 265.6
  },
  "luminance": 0.04939
}

Semantic roles & 50–950 ramp

primary

#1C388B

secondary

#BC9E47

accent

#BE3EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C388B

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

Preview Lab → · Contrast checker → · Palette generator →