#10304E#10304E

#10304E is a dark, moderate cyan. Relative luminance 0.028; OKLCH L 30.2% C 0.066 H 249.7°. Best body text is #FFFFFF at 13.51:1 contrast (WCAG AA passes).

Color values

HEX	#10304E
RGB	rgb(16, 48, 78)
HSL	hsl(209, 66%, 18%)
HSV	hsv(209, 79%, 31%)
CMYK	cmyk(79.5%, 38.5%, 0%, 69.4%)
CIE-LAB	lab(19.11, 0.17, -21.81)
CIE-LCH	lch(19.11, 21.81, 270.45°)
OKLab	oklab(30.23% -0.0229 -0.062)
OKLCH	oklch(30.23% 0.066 249.7)
XYZ	xyz(2.6453, 2.7738, 7.6022)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10304E #4E2E10

analogous

#104E4D #10304E #10114E

triadic

#10304E #4E1030 #304E10

tetradic

#10304E #4D104E #4E2E10 #114E10

square

#10304E #4D104E #4E2E10 #114E10

split-complementary

#10304E #4E1011 #4E4D10

monochromatic

#051019 #06111B #10304E #1A4F81 #256FB4

Accessibility & contrast

On white

13.51

#10304E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#10304E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10304E

13.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10304E	#FFFFFF	#000000	##FFFFFF
##10304E	1.00	13.51	1.55	13.51
#FFFFFF	13.51	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22324F

Deuteranopia (green-blind)

#192C4D

Tritanopia (blue-blind)

#00373B

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #10304e;
/* rgb */ color: rgb(16, 48, 78);
/* oklch */ color: oklch(30.2% 0.066 249.7);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#10304e",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 78
  },
  "hsl": {
    "h": 209.032,
    "s": 65.957,
    "l": 18.431
  },
  "oklch": {
    "l": 0.30226,
    "c": 0.06608,
    "h": 249.7
  },
  "luminance": 0.02774
}

Semantic roles & 50–950 ramp

primary

#10304E

secondary

#885C32

accent

#913FE9

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #10304E

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

Preview Lab → · Contrast checker → · Palette generator →