#1C309F#1C309F

#1C309F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.9% C 0.179 H 267.8°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1C309F
RGB	rgb(28, 48, 159)
HSL	hsl(231, 70%, 37%)
HSV	hsv(231, 82%, 62%)
CMYK	cmyk(82.4%, 69.8%, 0%, 37.6%)
CIE-LAB	lab(26.34, 34.70, -61.78)
CIE-LCH	lch(26.34, 70.85, 299.32°)
OKLab	oklab(37.89% -0.0068 -0.179)
OKLCH	oklch(37.89% 0.179 267.8)
XYZ	xyz(7.7917, 4.8631, 33.3222)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C309F #9F8B1C

analogous

#1C729F #1C309F #4A1C9F

triadic

#1C309F #9F1C30 #309F1C

tetradic

#1C309F #9F1C72 #9F8B1C #1C9F4A

square

#1C309F #9F1C72 #9F8B1C #1C9F4A

split-complementary

#1C309F #9F4A1C #729F1C

monochromatic

#0A1137 #13206B #1C309F #2540D3 #546AE1

Accessibility & contrast

On white

10.64

#1C309F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1C309F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C309F

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C309F	#FFFFFF	#000000	##FFFFFF
##1C309F	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A2

Deuteranopia (green-blind)

#00389D

Tritanopia (blue-blind)

#004F63

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1c309f;
/* rgb */ color: rgb(28, 48, 159);
/* oklch */ color: oklch(37.9% 0.179 267.8);

Tailwind

colors: {
  custom: {
    50: '#7168bc',
    500: '#1c309f',
    950: '#000000',
  },
}

SCSS

$custom: #1c309f;
$custom-light: #7168bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c309f",
  "rgb": {
    "r": 28,
    "g": 48,
    "b": 159
  },
  "hsl": {
    "h": 230.84,
    "s": 70.053,
    "l": 36.667
  },
  "oklch": {
    "l": 0.37893,
    "c": 0.17912,
    "h": 267.8
  },
  "luminance": 0.04864
}

Semantic roles & 50–950 ramp

primary

#1C309F

secondary

#C4B353

accent

#D23BED

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1C309F

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

Preview Lab → · Contrast checker → · Palette generator →