#1C3F99#1C3F99

#1C3F99 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.153 H 264.4°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F99
RGB	rgb(28, 63, 153)
HSL	hsl(223, 69%, 35%)
HSV	hsv(223, 82%, 60%)
CMYK	cmyk(81.7%, 58.8%, 0%, 40%)
CIE-LAB	lab(29.67, 22.33, -52.68)
CIE-LCH	lch(29.67, 57.21, 292.97°)
OKLab	oklab(40.18% -0.015 -0.1522)
OKLCH	oklch(40.18% 0.153 264.4)
XYZ	xyz(8.0041, 6.1008, 30.8865)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F99 #99761C

analogous

#1C7D99 #1C3F99 #371C99

triadic

#1C3F99 #991C3F #3F991C

tetradic

#1C3F99 #991C7D #99761C #1C9937

square

#1C3F99 #991C7D #99761C #1C9937

split-complementary

#1C3F99 #99371C #7D991C

monochromatic

#091432 #132A65 #1C3F99 #2554CD #5078DF

Accessibility & contrast

On white

9.46

#1C3F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1C3F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F99

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F99	#FFFFFF	#000000	##FFFFFF
##1C3F99	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005665

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1c3f99;
/* rgb */ color: rgb(28, 63, 153);
/* oklch */ color: oklch(40.2% 0.153 264.4);

Tailwind

colors: {
  custom: {
    50: '#6e73b8',
    500: '#1c3f99',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f99;
$custom-light: #6e73b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f99",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 223.2,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.40181,
    "c": 0.15294,
    "h": 264.4
  },
  "luminance": 0.06102
}

Semantic roles & 50–950 ramp

primary

#1C3F99

secondary

#C2A24F

accent

#BB3CEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1C3F99

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

Preview Lab → · Contrast checker → · Palette generator →