#10283B#10283B

#10283B is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.8% C 0.047 H 244.7°. Best body text is #FFFFFF at 15.12:1 contrast (WCAG AA passes).

Color values

HEX	#10283B
RGB	rgb(16, 40, 59)
HSL	hsl(207, 57%, 15%)
HSV	hsv(207, 73%, 23%)
CMYK	cmyk(72.9%, 32.2%, 0%, 76.9%)
CIE-LAB	lab(15.19, -2.11, -14.96)
CIE-LCH	lch(15.19, 15.11, 261.99°)
OKLab	oklab(26.77% -0.0199 -0.0421)
OKLCH	oklch(26.77% 0.047 244.7)
XYZ	xyz(1.7616, 1.9433, 4.4191)
Luminance	0.0194 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10283B #3B2310

analogous

#103B39 #10283B #10123B

triadic

#10283B #3B1028 #283B10

tetradic

#10283B #39103B #3B2310 #123B10

square

#10283B #39103B #3B2310 #123B10

split-complementary

#10283B #3B1012 #3B3910

monochromatic

#071018 #071018 #10283B #1D496B #2A699B

Accessibility & contrast

On white

15.12

#10283B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#10283B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10283B

15.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10283B	#FFFFFF	#000000	##FFFFFF
##10283B	1.00	15.12	1.39	15.12
#FFFFFF	15.12	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20283C

Deuteranopia (green-blind)

#1A243B

Tritanopia (blue-blind)

#002D2F

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #10283b;
/* rgb */ color: rgb(16, 40, 59);
/* oklch */ color: oklch(26.8% 0.047 244.7);

Tailwind

colors: {
  custom: {
    50: '#536171',
    500: '#10283b',
    950: '#000000',
  },
}

SCSS

$custom: #10283b;
$custom-light: #536171;
$custom-dark: #000000;

JSON

{
  "hex": "#10283b",
  "rgb": {
    "r": 16,
    "g": 40,
    "b": 59
  },
  "hsl": {
    "h": 206.512,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.26773,
    "c": 0.04659,
    "h": 244.7
  },
  "luminance": 0.01944
}

Semantic roles & 50–950 ramp

primary

#10283B

secondary

#755032

accent

#8B47E1

background

#F4F5F6

surface

#E8E9EC

border

#C4C5C7

text

#030507

muted

#78797A

Preview Lab

Preview with #10283B

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

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