#1C307F#1C307F

#1C307F is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.7% C 0.136 H 267.7°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#1C307F
RGB	rgb(28, 48, 127)
HSL	hsl(228, 64%, 30%)
HSV	hsv(228, 78%, 50%)
CMYK	cmyk(78%, 62.2%, 0%, 50.2%)
CIE-LAB	lab(23.31, 22.35, -46.93)
CIE-LCH	lch(23.31, 51.98, 295.47°)
OKLab	oklab(34.74% -0.0055 -0.1356)
OKLCH	oklch(34.74% 0.136 267.7)
XYZ	xyz(5.3653, 3.8925, 20.5431)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C307F #7F6B1C

analogous

#1C617F #1C307F #3A1C7F

triadic

#1C307F #7F1C30 #307F1C

tetradic

#1C307F #7F1C61 #7F6B1C #1C7F3A

square

#1C307F #7F1C61 #7F6B1C #1C7F3A

split-complementary

#1C307F #7F3A1C #617F1C

monochromatic

#060A1B #111D4D #1C307F #2743B1 #405ED5

Accessibility & contrast

On white

11.81

#1C307F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1C307F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C307F

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C307F	#FFFFFF	#000000	##FFFFFF
##1C307F	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C82

Deuteranopia (green-blind)

#00337D

Tritanopia (blue-blind)

#004452

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1c307f;
/* rgb */ color: rgb(28, 48, 127);
/* oklch */ color: oklch(34.7% 0.136 267.7);

Tailwind

colors: {
  custom: {
    50: '#6968a5',
    500: '#1c307f',
    950: '#000000',
  },
}

SCSS

$custom: #1c307f;
$custom-light: #6968a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1c307f",
  "rgb": {
    "r": 28,
    "g": 48,
    "b": 127
  },
  "hsl": {
    "h": 227.879,
    "s": 63.871,
    "l": 30.392
  },
  "oklch": {
    "l": 0.34744,
    "c": 0.13567,
    "h": 267.7
  },
  "luminance": 0.03893
}

Semantic roles & 50–950 ramp

primary

#1C307F

secondary

#B39C44

accent

#C541E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1C307F

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

Preview Lab → · Contrast checker → · Palette generator →