#1C3F9F#1C3F9F

#1C3F9F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.161 H 264.7°. Best body text is #FFFFFF at 9.29:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F9F
RGB	rgb(28, 63, 159)
HSL	hsl(224, 70%, 37%)
HSV	hsv(224, 82%, 62%)
CMYK	cmyk(82.4%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(30.17, 24.71, -55.50)
CIE-LCH	lch(30.17, 60.75, 294.00°)
OKLab	oklab(40.71% -0.0148 -0.1605)
OKLCH	oklch(40.71% 0.161 264.7)
XYZ	xyz(8.5122, 6.3041, 33.5623)
Luminance	0.0630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F9F #9F7C1C

analogous

#1C819F #1C3F9F #3A1C9F

triadic

#1C3F9F #9F1C3F #3F9F1C

tetradic

#1C3F9F #9F1C81 #9F7C1C #1C9F3A

square

#1C3F9F #9F1C81 #9F7C1C #1C9F3A

split-complementary

#1C3F9F #9F3A1C #819F1C

monochromatic

#0A1637 #132A6B #1C3F9F #2554D3 #547AE1

Accessibility & contrast

On white

9.29

#1C3F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1C3F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F9F

9.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F9F	#FFFFFF	#000000	##FFFFFF
##1C3F9F	1.00	9.29	2.26	9.29
#FFFFFF	9.29	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00419D

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1c3f9f;
/* rgb */ color: rgb(28, 63, 159);
/* oklch */ color: oklch(40.7% 0.161 264.7);

Tailwind

colors: {
  custom: {
    50: '#7073bc',
    500: '#1c3f9f',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f9f;
$custom-light: #7073bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f9f",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 223.969,
    "s": 70.053,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40713,
    "c": 0.16118,
    "h": 264.7
  },
  "luminance": 0.06305
}

Semantic roles & 50–950 ramp

primary

#1C3F9F

secondary

#C4A653

accent

#BD3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1C3F9F

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

Preview Lab → · Contrast checker → · Palette generator →