#1C307D#1C307D

#1C307D is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.6% C 0.133 H 267.6°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#1C307D
RGB	rgb(28, 48, 125)
HSL	hsl(228, 63%, 30%)
HSV	hsv(228, 78%, 49%)
CMYK	cmyk(77.6%, 61.6%, 0%, 51%)
CIE-LAB	lab(23.14, 21.55, -45.95)
CIE-LCH	lch(23.14, 50.75, 295.13°)
OKLab	oklab(34.56% -0.0055 -0.1327)
OKLCH	oklch(34.56% 0.133 267.6)
XYZ	xyz(5.2362, 3.8409, 19.8635)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C307D #7D691C

analogous

#1C607D #1C307D #391C7D

triadic

#1C307D #7D1C30 #307D1C

tetradic

#1C307D #7D1C60 #7D691C #1C7D39

square

#1C307D #7D1C60 #7D691C #1C7D39

split-complementary

#1C307D #7D391C #607D1C

monochromatic

#060A19 #111D4B #1C307D #2743AF #3F5ED4

Accessibility & contrast

On white

11.88

#1C307D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1C307D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C307D

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C307D	#FFFFFF	#000000	##FFFFFF
##1C307D	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C80

Deuteranopia (green-blind)

#00337C

Tritanopia (blue-blind)

#004351

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1c307d;
/* rgb */ color: rgb(28, 48, 125);
/* oklch */ color: oklch(34.6% 0.133 267.6);

Tailwind

colors: {
  custom: {
    50: '#6868a3',
    500: '#1c307d',
    950: '#000000',
  },
}

SCSS

$custom: #1c307d;
$custom-light: #6868a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1c307d",
  "rgb": {
    "r": 28,
    "g": 48,
    "b": 125
  },
  "hsl": {
    "h": 227.629,
    "s": 63.399,
    "l": 30
  },
  "oklch": {
    "l": 0.34559,
    "c": 0.1328,
    "h": 267.6
  },
  "luminance": 0.03841
}

Semantic roles & 50–950 ramp

primary

#1C307D

secondary

#B19A44

accent

#C441E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1C307D

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

Preview Lab → · Contrast checker → · Palette generator →