#101B5A#101B5A

#101B5A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.2% C 0.113 H 269.0°. Best body text is #FFFFFF at 15.83:1 contrast (WCAG AA passes).

Color values

HEX	#101B5A
RGB	rgb(16, 27, 90)
HSL	hsl(231, 70%, 21%)
HSV	hsv(231, 82%, 35%)
CMYK	cmyk(82.2%, 70%, 0%, 64.7%)
CIE-LAB	lab(13.42, 20.88, -39.07)
CIE-LCH	lch(13.42, 44.30, 298.12°)
OKLab	oklab(26.19% -0.0019 -0.113)
OKLCH	oklch(26.19% 0.113 269)
XYZ	xyz(2.4504, 1.6319, 9.8567)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B5A #5A4F10

analogous

#10405A #101B5A #2A105A

triadic

#101B5A #5A101B #1B5A10

tetradic

#101B5A #5A1040 #5A4F10 #105A2A

square

#101B5A #5A1040 #5A4F10 #105A2A

split-complementary

#101B5A #5A2A10 #405A10

monochromatic

#05081A #070B26 #101B5A #192B8E #223AC2

Accessibility & contrast

On white

15.83

#101B5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#101B5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B5A

15.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B5A	#FFFFFF	#000000	##FFFFFF
##101B5A	1.00	15.83	1.33	15.83
#FFFFFF	15.83	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265C

Deuteranopia (green-blind)

#001F59

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #101b5a;
/* rgb */ color: rgb(16, 27, 90);
/* oklch */ color: oklch(26.2% 0.113 269.0);

Tailwind

colors: {
  custom: {
    50: '#5c5789',
    500: '#101b5a',
    950: '#000000',
  },
}

SCSS

$custom: #101b5a;
$custom-light: #5c5789;
$custom-dark: #000000;

JSON

{
  "hex": "#101b5a",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 90
  },
  "hsl": {
    "h": 231.081,
    "s": 69.811,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26192,
    "c": 0.11306,
    "h": 269
  },
  "luminance": 0.01632
}

Semantic roles & 50–950 ramp

primary

#101B5A

secondary

#938533

accent

#D23BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101B5A

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

Preview Lab → · Contrast checker → · Palette generator →