#1C3C8B#1C3C8B

#1C3C8B is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.137 H 264.2°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#1C3C8B
RGB	rgb(28, 60, 139)
HSL	hsl(223, 66%, 33%)
HSV	hsv(223, 80%, 55%)
CMYK	cmyk(79.9%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(27.69, 18.78, -47.30)
CIE-LCH	lch(27.69, 50.90, 291.66°)
OKLab	oklab(38.34% -0.0138 -0.1365)
OKLCH	oklch(38.34% 0.137 264.2)
XYZ	xyz(6.7533, 5.3419, 25.0963)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3C8B #8B6B1C

analogous

#1C738B #1C3C8B #341C8B

triadic

#1C3C8B #8B1C3C #3C8B1C

tetradic

#1C3C8B #8B1C73 #8B6B1C #1C8B34

square

#1C3C8B #8B1C73 #8B6B1C #1C8B34

split-complementary

#1C3C8B #8B341C #738B1C

monochromatic

#071025 #122658 #1C3C8B #2652BE #4772DA

Accessibility & contrast

On white

10.15

#1C3C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1C3C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3C8B

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3C8B	#FFFFFF	#000000	##FFFFFF
##1C3C8B	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1c3c8b;
/* rgb */ color: rgb(28, 60, 139);
/* oklch */ color: oklch(38.3% 0.137 264.2);

Tailwind

colors: {
  custom: {
    50: '#6b71ae',
    500: '#1c3c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1c3c8b;
$custom-light: #6b71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3c8b",
  "rgb": {
    "r": 28,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 222.703,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38336,
    "c": 0.13716,
    "h": 264.2
  },
  "luminance": 0.05343
}

Semantic roles & 50–950 ramp

primary

#1C3C8B

secondary

#BC9A47

accent

#B83EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C3C8B

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

Preview Lab → · Contrast checker → · Palette generator →