#101B5D#101B5D

#101B5D is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.117 H 269.0°. Best body text is #FFFFFF at 15.71:1 contrast (WCAG AA passes).

Color values

HEX	#101B5D
RGB	rgb(16, 27, 93)
HSL	hsl(231, 71%, 21%)
HSV	hsv(231, 83%, 36%)
CMYK	cmyk(82.8%, 71%, 0%, 63.5%)
CIE-LAB	lab(13.73, 22.12, -40.57)
CIE-LCH	lch(13.73, 46.21, 298.60°)
OKLab	oklab(26.51% -0.0021 -0.1174)
OKLCH	oklch(26.51% 0.117 269)
XYZ	xyz(2.5807, 1.6841, 10.5428)
Luminance	0.0168 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B5D #5D5210

analogous

#10425D #101B5D #2C105D

triadic

#101B5D #5D101B #1B5D10

tetradic

#101B5D #5D1042 #5D5210 #105D2C

square

#101B5D #5D1042 #5D5210 #105D2C

split-complementary

#101B5D #5D2C10 #425D10

monochromatic

#04081A #070C29 #101B5D #192A91 #2239C5

Accessibility & contrast

On white

15.71

#101B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#101B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B5D

15.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B5D	#FFFFFF	#000000	##FFFFFF
##101B5D	1.00	15.71	1.34	15.71
#FFFFFF	15.71	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275F

Deuteranopia (green-blind)

#001F5C

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #101b5d;
/* rgb */ color: rgb(16, 27, 93);
/* oklch */ color: oklch(26.5% 0.117 269.0);

Tailwind

colors: {
  custom: {
    50: '#5d578c',
    500: '#101b5d',
    950: '#000000',
  },
}

SCSS

$custom: #101b5d;
$custom-light: #5d578c;
$custom-dark: #000000;

JSON

{
  "hex": "#101b5d",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 93
  },
  "hsl": {
    "h": 231.429,
    "s": 70.642,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26514,
    "c": 0.11745,
    "h": 269
  },
  "luminance": 0.01684
}

Semantic roles & 50–950 ramp

primary

#101B5D

secondary

#968833

accent

#D43AED

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101B5D

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

Preview Lab → · Contrast checker → · Palette generator →