#10304C#10304C

#10304C is a dark, moderate cyan. Relative luminance 0.027; OKLCH L 30.1% C 0.063 H 248.1°. Best body text is #FFFFFF at 13.56:1 contrast (WCAG AA passes).

Color values

HEX	#10304C
RGB	rgb(16, 48, 76)
HSL	hsl(208, 65%, 18%)
HSV	hsv(208, 79%, 30%)
CMYK	cmyk(78.9%, 36.8%, 0%, 70.2%)
CIE-LAB	lab(18.99, -0.68, -20.65)
CIE-LCH	lch(18.99, 20.66, 268.13°)
OKLab	oklab(30.09% -0.0236 -0.0586)
OKLCH	oklch(30.09% 0.063 248.1)
XYZ	xyz(2.5747, 2.7456, 7.2303)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10304C #4C2C10

analogous

#104C4A #10304C #10124C

triadic

#10304C #4C1030 #304C10

tetradic

#10304C #4A104C #4C2C10 #124C10

square

#10304C #4A104C #4C2C10 #124C10

split-complementary

#10304C #4C1012 #4C4A10

monochromatic

#051019 #051019 #10304C #1B507F #2570B1

Accessibility & contrast

On white

13.56

#10304C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#10304C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10304C

13.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10304C	#FFFFFF	#000000	##FFFFFF
##10304C	1.00	13.56	1.55	13.56
#FFFFFF	13.56	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23314D

Deuteranopia (green-blind)

#1B2C4B

Tritanopia (blue-blind)

#00373A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #10304c;
/* rgb */ color: rgb(16, 48, 76);
/* oklch */ color: oklch(30.1% 0.063 248.1);

Tailwind

colors: {
  custom: {
    50: '#57687e',
    500: '#10304c',
    950: '#000000',
  },
}

SCSS

$custom: #10304c;
$custom-light: #57687e;
$custom-dark: #000000;

JSON

{
  "hex": "#10304c",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 76
  },
  "hsl": {
    "h": 208,
    "s": 65.217,
    "l": 18.039
  },
  "oklch": {
    "l": 0.30093,
    "c": 0.06315,
    "h": 248.1
  },
  "luminance": 0.02746
}

Semantic roles & 50–950 ramp

primary

#10304C

secondary

#865932

accent

#8E40E8

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #10304C

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

Preview Lab → · Contrast checker → · Palette generator →