#10303E#10303E

#10303E is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.2% C 0.045 H 229.8°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#10303E
RGB	rgb(16, 48, 62)
HSL	hsl(198, 59%, 15%)
HSV	hsv(198, 74%, 24%)
CMYK	cmyk(74.2%, 22.6%, 0%, 75.7%)
CIE-LAB	lab(18.24, -6.40, -12.30)
CIE-LCH	lch(18.24, 13.87, 242.51°)
OKLab	oklab(29.25% -0.029 -0.0344)
OKLCH	oklch(29.25% 0.045 229.8)
XYZ	xyz(2.1398, 2.5716, 4.9401)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10303E #3E1E10

analogous

#103E35 #10303E #10193E

triadic

#10303E #3E1030 #303E10

tetradic

#10303E #35103E #3E1E10 #193E10

square

#10303E #35103E #3E1E10 #193E10

split-complementary

#10303E #3E1019 #3E3510

monochromatic

#061318 #061318 #10303E #1D566F #297B9F

Accessibility & contrast

On white

13.87

#10303E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#10303E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10303E

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10303E	#FFFFFF	#000000	##FFFFFF
##10303E	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#292F3F

Deuteranopia (green-blind)

#222A3E

Tritanopia (blue-blind)

#003435

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #10303e;
/* rgb */ color: rgb(16, 48, 62);
/* oklch */ color: oklch(29.2% 0.045 229.8);

Tailwind

colors: {
  custom: {
    50: '#546873',
    500: '#10303e',
    950: '#000000',
  },
}

SCSS

$custom: #10303e;
$custom-light: #546873;
$custom-dark: #000000;

JSON

{
  "hex": "#10303e",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 62
  },
  "hsl": {
    "h": 198.261,
    "s": 58.974,
    "l": 15.294
  },
  "oklch": {
    "l": 0.29247,
    "c": 0.04502,
    "h": 229.8
  },
  "luminance": 0.02572
}

Semantic roles & 50–950 ramp

primary

#10303E

secondary

#784732

accent

#7546E2

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030608

muted

#787A7B

Preview Lab

Preview with #10303E

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

Preview Lab → · Contrast checker → · Palette generator →