#101B5C#101B5C

#101B5C is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.116 H 269.0°. Best body text is #FFFFFF at 15.75:1 contrast (WCAG AA passes).

Color values

HEX	#101B5C
RGB	rgb(16, 27, 92)
HSL	hsl(231, 70%, 21%)
HSV	hsv(231, 83%, 36%)
CMYK	cmyk(82.6%, 70.7%, 0%, 63.9%)
CIE-LAB	lab(13.63, 21.71, -40.08)
CIE-LCH	lch(13.63, 45.58, 298.44°)
OKLab	oklab(26.41% -0.002 -0.116)
OKLCH	oklch(26.41% 0.116 269)
XYZ	xyz(2.5367, 1.6664, 10.3111)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B5C #5C5110

analogous

#10415C #101B5C #2B105C

triadic

#101B5C #5C101B #1B5C10

tetradic

#101B5C #5C1041 #5C5110 #105C2B

square

#101B5C #5C1041 #5C5110 #105C2B

split-complementary

#101B5C #5C2B10 #415C10

monochromatic

#05081A #070C28 #101B5C #192A90 #223AC4

Accessibility & contrast

On white

15.75

#101B5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#101B5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B5C

15.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B5C	#FFFFFF	#000000	##FFFFFF
##101B5C	1.00	15.75	1.33	15.75
#FFFFFF	15.75	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265E

Deuteranopia (green-blind)

#001F5B

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #101b5c;
/* rgb */ color: rgb(16, 27, 92);
/* oklch */ color: oklch(26.4% 0.116 269.0);

Tailwind

colors: {
  custom: {
    50: '#5d578b',
    500: '#101b5c',
    950: '#000000',
  },
}

SCSS

$custom: #101b5c;
$custom-light: #5d578b;
$custom-dark: #000000;

JSON

{
  "hex": "#101b5c",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 92
  },
  "hsl": {
    "h": 231.316,
    "s": 70.37,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26406,
    "c": 0.11599,
    "h": 269
  },
  "luminance": 0.01667
}

Semantic roles & 50–950 ramp

primary

#101B5C

secondary

#958733

accent

#D33BED

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101B5C

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

Preview Lab → · Contrast checker → · Palette generator →