#1C3F8D#1C3F8D

#1C3F8D is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.136 H 263.3°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F8D
RGB	rgb(28, 63, 141)
HSL	hsl(221, 67%, 33%)
HSV	hsv(221, 80%, 55%)
CMYK	cmyk(80.1%, 55.3%, 0%, 44.7%)
CIE-LAB	lab(28.71, 17.51, -46.88)
CIE-LCH	lch(28.71, 50.05, 290.48°)
OKLab	oklab(39.16% -0.0159 -0.1352)
OKLCH	oklch(39.16% 0.136 263.3)
XYZ	xyz(7.0624, 5.7242, 25.9268)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F8D #8D6A1C

analogous

#1C778D #1C3F8D #311C8D

triadic

#1C3F8D #8D1C3F #3F8D1C

tetradic

#1C3F8D #8D1C77 #8D6A1C #1C8D31

square

#1C3F8D #8D1C77 #8D6A1C #1C8D31

split-complementary

#1C3F8D #8D311C #778D1C

monochromatic

#081127 #12285A #1C3F8D #2656C0 #4976DB

Accessibility & contrast

On white

9.79

#1C3F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1C3F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F8D

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F8D	#FFFFFF	#000000	##FFFFFF
##1C3F8D	1.00	9.79	2.15	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004990

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1c3f8d;
/* rgb */ color: rgb(28, 63, 141);
/* oklch */ color: oklch(39.2% 0.136 263.3);

Tailwind

colors: {
  custom: {
    50: '#6b73af',
    500: '#1c3f8d',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f8d;
$custom-light: #6b73af;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f8d",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 141
  },
  "hsl": {
    "h": 221.416,
    "s": 66.864,
    "l": 33.137
  },
  "oklch": {
    "l": 0.39156,
    "c": 0.13611,
    "h": 263.3
  },
  "luminance": 0.05725
}

Semantic roles & 50–950 ramp

primary

#1C3F8D

secondary

#BD9948

accent

#B53EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1C3F8D

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

Preview Lab → · Contrast checker → · Palette generator →