#10243B#10243B

#10243B is a dark, muted cyan. Relative luminance 0.017; OKLCH L 25.6% C 0.051 H 253.3°. Best body text is #FFFFFF at 15.70:1 contrast (WCAG AA passes).

Color values

HEX	#10243B
RGB	rgb(16, 36, 59)
HSL	hsl(212, 57%, 15%)
HSV	hsv(212, 73%, 23%)
CMYK	cmyk(72.9%, 39%, 0%, 76.9%)
CIE-LAB	lab(13.75, 0.79, -17.21)
CIE-LCH	lch(13.75, 17.23, 272.62°)
OKLab	oklab(25.65% -0.0147 -0.0487)
OKLCH	oklch(25.65% 0.051 253.3)
XYZ	xyz(1.6337, 1.6875, 4.3765)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10243B #3B2710

analogous

#103A3B #10243B #12103B

triadic

#10243B #3B1024 #243B10

tetradic

#10243B #3B103A #3B2710 #103B12

square

#10243B #3B103A #3B2710 #103B12

split-complementary

#10243B #3B1210 #3A3B10

monochromatic

#070F18 #070F18 #10243B #1D416B #2A5F9B

Accessibility & contrast

On white

15.70

#10243B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#10243B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10243B

15.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10243B	#FFFFFF	#000000	##FFFFFF
##10243B	1.00	15.70	1.34	15.70
#FFFFFF	15.70	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A253C

Deuteranopia (green-blind)

#14213B

Tritanopia (blue-blind)

#00292C

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #10243b;
/* rgb */ color: rgb(16, 36, 59);
/* oklch */ color: oklch(25.6% 0.051 253.3);

Tailwind

colors: {
  custom: {
    50: '#535e71',
    500: '#10243b',
    950: '#000000',
  },
}

SCSS

$custom: #10243b;
$custom-light: #535e71;
$custom-dark: #000000;

JSON

{
  "hex": "#10243b",
  "rgb": {
    "r": 16,
    "g": 36,
    "b": 59
  },
  "hsl": {
    "h": 212.093,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.25646,
    "c": 0.05088,
    "h": 253.3
  },
  "luminance": 0.01688
}

Semantic roles & 50–950 ramp

primary

#10243B

secondary

#755632

accent

#9947E1

background

#F4F5F6

surface

#E8E9EC

border

#C4C5C7

text

#030407

muted

#78797A

Preview Lab

Preview with #10243B

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

Preview Lab → · Contrast checker → · Palette generator →