#1C307B#1C307B

#1C307B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.4% C 0.130 H 267.6°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#1C307B
RGB	rgb(28, 48, 123)
HSL	hsl(227, 63%, 30%)
HSV	hsv(227, 77%, 48%)
CMYK	cmyk(77.2%, 61%, 0%, 51.8%)
CIE-LAB	lab(22.97, 20.75, -44.97)
CIE-LCH	lch(22.97, 49.52, 294.77°)
OKLab	oklab(34.38% -0.0055 -0.1298)
OKLCH	oklch(34.38% 0.13 267.6)
XYZ	xyz(5.1097, 3.7903, 19.1974)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C307B #7B671C

analogous

#1C607B #1C307B #371C7B

triadic

#1C307B #7B1C30 #307B1C

tetradic

#1C307B #7B1C60 #7B671C #1C7B37

square

#1C307B #7B1C60 #7B671C #1C7B37

split-complementary

#1C307B #7B371C #607B1C

monochromatic

#060A19 #111D49 #1C307B #2743AD #3E5ED3

Accessibility & contrast

On white

11.94

#1C307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1C307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C307B

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C307B	#FFFFFF	#000000	##FFFFFF
##1C307B	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00337A

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1c307b;
/* rgb */ color: rgb(28, 48, 123);
/* oklch */ color: oklch(34.4% 0.130 267.6);

Tailwind

colors: {
  custom: {
    50: '#6868a2',
    500: '#1c307b',
    950: '#000000',
  },
}

SCSS

$custom: #1c307b;
$custom-light: #6868a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c307b",
  "rgb": {
    "r": 28,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 227.368,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.34377,
    "c": 0.12992,
    "h": 267.6
  },
  "luminance": 0.03791
}

Semantic roles & 50–950 ramp

primary

#1C307B

secondary

#AF9844

accent

#C342E6

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1C307B

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

Preview Lab → · Contrast checker → · Palette generator →