#10304F#10304F

#10304F is a dark, moderate cyan. Relative luminance 0.028; OKLCH L 30.3% C 0.068 H 250.5°. Best body text is #FFFFFF at 13.48:1 contrast (WCAG AA passes).

Color values

HEX	#10304F
RGB	rgb(16, 48, 79)
HSL	hsl(210, 66%, 19%)
HSV	hsv(210, 80%, 31%)
CMYK	cmyk(79.7%, 39.2%, 0%, 69%)
CIE-LAB	lab(19.18, 0.59, -22.39)
CIE-LCH	lch(19.18, 22.40, 271.52°)
OKLab	oklab(30.29% -0.0226 -0.0637)
OKLCH	oklch(30.29% 0.068 250.5)
XYZ	xyz(2.6814, 2.7883, 7.7925)
Luminance	0.0279 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10304F #4F2F10

analogous

#104F4E #10304F #10104F

triadic

#10304F #4F1030 #304F10

tetradic

#10304F #4E104F #4F2F10 #104F10

square

#10304F #4E104F #4F2F10 #104F10

split-complementary

#10304F #4F1010 #4F4E10

monochromatic

#050F19 #06111C #10304F #1A4F82 #256EB5

Accessibility & contrast

On white

13.48

#10304F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#10304F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10304F

13.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10304F	#FFFFFF	#000000	##FFFFFF
##10304F	1.00	13.48	1.56	13.48
#FFFFFF	13.48	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#223250

Deuteranopia (green-blind)

#192C4E

Tritanopia (blue-blind)

#00373B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #10304f;
/* rgb */ color: rgb(16, 48, 79);
/* oklch */ color: oklch(30.3% 0.068 250.5);

Tailwind

colors: {
  custom: {
    50: '#586880',
    500: '#10304f',
    950: '#000000',
  },
}

SCSS

$custom: #10304f;
$custom-light: #586880;
$custom-dark: #000000;

JSON

{
  "hex": "#10304f",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 79
  },
  "hsl": {
    "h": 209.524,
    "s": 66.316,
    "l": 18.627
  },
  "oklch": {
    "l": 0.30294,
    "c": 0.06755,
    "h": 250.5
  },
  "luminance": 0.02789
}

Semantic roles & 50–950 ramp

primary

#10304F

secondary

#895D32

accent

#933FE9

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #10304F

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

Preview Lab → · Contrast checker → · Palette generator →