#101B5B#101B5B

#101B5B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.3% C 0.115 H 269.0°. Best body text is #FFFFFF at 15.79:1 contrast (WCAG AA passes).

Color values

HEX	#101B5B
RGB	rgb(16, 27, 91)
HSL	hsl(231, 70%, 21%)
HSV	hsv(231, 82%, 36%)
CMYK	cmyk(82.4%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(13.53, 21.30, -39.58)
CIE-LCH	lch(13.53, 44.94, 298.29°)
OKLab	oklab(26.3% -0.002 -0.1145)
OKLCH	oklch(26.3% 0.115 269)
XYZ	xyz(2.4933, 1.6491, 10.0824)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B5B #5B5010

analogous

#10405B #101B5B #2A105B

triadic

#101B5B #5B101B #1B5B10

tetradic

#101B5B #5B1040 #5B5010 #105B2A

square

#101B5B #5B1040 #5B5010 #105B2A

split-complementary

#101B5B #5B2A10 #405B10

monochromatic

#05081A #070C27 #101B5B #192A8F #223AC3

Accessibility & contrast

On white

15.79

#101B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#101B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B5B

15.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B5B	#FFFFFF	#000000	##FFFFFF
##101B5B	1.00	15.79	1.33	15.79
#FFFFFF	15.79	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265D

Deuteranopia (green-blind)

#001F5A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #101b5b;
/* rgb */ color: rgb(16, 27, 91);
/* oklch */ color: oklch(26.3% 0.115 269.0);

Tailwind

colors: {
  custom: {
    50: '#5d578a',
    500: '#101b5b',
    950: '#000000',
  },
}

SCSS

$custom: #101b5b;
$custom-light: #5d578a;
$custom-dark: #000000;

JSON

{
  "hex": "#101b5b",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 231.2,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26299,
    "c": 0.11453,
    "h": 269
  },
  "luminance": 0.01649
}

Semantic roles & 50–950 ramp

primary

#101B5B

secondary

#948633

accent

#D33BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101B5B

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

Preview Lab → · Contrast checker → · Palette generator →