#10233B#10233B

#10233B is a dark, muted cyan. Relative luminance 0.016; OKLCH L 25.4% C 0.052 H 255.1°. Best body text is #FFFFFF at 15.84:1 contrast (WCAG AA passes).

Color values

HEX	#10233B
RGB	rgb(16, 35, 59)
HSL	hsl(213, 57%, 15%)
HSV	hsv(213, 73%, 23%)
CMYK	cmyk(72.9%, 40.7%, 0%, 76.9%)
CIE-LAB	lab(13.40, 1.53, -17.77)
CIE-LCH	lch(13.40, 17.84, 274.92°)
OKLab	oklab(25.37% -0.0134 -0.0504)
OKLCH	oklch(25.37% 0.052 255.1)
XYZ	xyz(1.6039, 1.6278, 4.3665)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10233B #3B2810

analogous

#10393B #10233B #12103B

triadic

#10233B #3B1023 #233B10

tetradic

#10233B #3B1039 #3B2810 #103B12

square

#10233B #3B1039 #3B2810 #103B12

split-complementary

#10233B #3B1210 #393B10

monochromatic

#070E18 #070E18 #10233B #1D406B #2A5C9B

Accessibility & contrast

On white

15.84

#10233B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#10233B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10233B

15.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10233B	#FFFFFF	#000000	##FFFFFF
##10233B	1.00	15.84	1.33	15.84
#FFFFFF	15.84	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19253C

Deuteranopia (green-blind)

#13213B

Tritanopia (blue-blind)

#00292C

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #10233b;
/* rgb */ color: rgb(16, 35, 59);
/* oklch */ color: oklch(25.4% 0.052 255.1);

Tailwind

colors: {
  custom: {
    50: '#535d71',
    500: '#10233b',
    950: '#000000',
  },
}

SCSS

$custom: #10233b;
$custom-light: #535d71;
$custom-dark: #000000;

JSON

{
  "hex": "#10233b",
  "rgb": {
    "r": 16,
    "g": 35,
    "b": 59
  },
  "hsl": {
    "h": 213.488,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.25369,
    "c": 0.0521,
    "h": 255.1
  },
  "luminance": 0.01628
}

Semantic roles & 50–950 ramp

primary

#10233B

secondary

#755732

accent

#9D47E1

background

#F4F5F6

surface

#E8E9EC

border

#C4C5C7

text

#030407

muted

#78797A

Preview Lab

Preview with #10233B

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

Preview Lab → · Contrast checker → · Palette generator →