#101F5A#101F5A

#101F5A is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.108 H 267.5°. Best body text is #FFFFFF at 15.38:1 contrast (WCAG AA passes).

Color values

HEX	#101F5A
RGB	rgb(16, 31, 90)
HSL	hsl(228, 70%, 21%)
HSV	hsv(228, 82%, 35%)
CMYK	cmyk(82.2%, 65.6%, 0%, 64.7%)
CIE-LAB	lab(14.56, 17.94, -37.22)
CIE-LCH	lch(14.56, 41.31, 295.74°)
OKLab	oklab(27.03% -0.0047 -0.1075)
OKLCH	oklch(27.03% 0.108 267.5)
XYZ	xyz(2.5485, 1.8280, 9.8894)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F5A #5A4B10

analogous

#10445A #101F5A #26105A

triadic

#101F5A #5A101F #1F5A10

tetradic

#101F5A #5A1044 #5A4B10 #105A26

square

#101F5A #5A1044 #5A4B10 #105A26

split-complementary

#101F5A #5A2610 #445A10

monochromatic

#05091A #070D26 #101F5A #19318E #2243C2

Accessibility & contrast

On white

15.38

#101F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#101F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F5A

15.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F5A	#FFFFFF	#000000	##FFFFFF
##101F5A	1.00	15.38	1.37	15.38
#FFFFFF	15.38	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285C

Deuteranopia (green-blind)

#002159

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #101f5a;
/* rgb */ color: rgb(16, 31, 90);
/* oklch */ color: oklch(27.0% 0.108 267.5);

Tailwind

colors: {
  custom: {
    50: '#5c5a89',
    500: '#101f5a',
    950: '#000000',
  },
}

SCSS

$custom: #101f5a;
$custom-light: #5c5a89;
$custom-dark: #000000;

JSON

{
  "hex": "#101f5a",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 90
  },
  "hsl": {
    "h": 227.838,
    "s": 69.811,
    "l": 20.784
  },
  "oklch": {
    "l": 0.27029,
    "c": 0.10765,
    "h": 267.5
  },
  "luminance": 0.01828
}

Semantic roles & 50–950 ramp

primary

#101F5A

secondary

#938033

accent

#C93BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #101F5A

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

Preview Lab → · Contrast checker → · Palette generator →