#101F5C#101F5C

#101F5C is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.2% C 0.111 H 267.6°. Best body text is #FFFFFF at 15.30:1 contrast (WCAG AA passes).

Color values

HEX	#101F5C
RGB	rgb(16, 31, 92)
HSL	hsl(228, 70%, 21%)
HSV	hsv(228, 83%, 36%)
CMYK	cmyk(82.6%, 66.3%, 0%, 63.9%)
CIE-LAB	lab(14.75, 18.79, -38.24)
CIE-LCH	lch(14.75, 42.61, 296.16°)
OKLab	oklab(27.23% -0.0047 -0.1106)
OKLCH	oklch(27.23% 0.111 267.6)
XYZ	xyz(2.6348, 1.8625, 10.3438)
Luminance	0.0186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F5C #5C4D10

analogous

#10455C #101F5C #27105C

triadic

#101F5C #5C101F #1F5C10

tetradic

#101F5C #5C1045 #5C4D10 #105C27

square

#101F5C #5C1045 #5C4D10 #105C27

split-complementary

#101F5C #5C2710 #455C10

monochromatic

#05091A #070D28 #101F5C #193190 #2242C4

Accessibility & contrast

On white

15.30

#101F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#101F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F5C

15.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F5C	#FFFFFF	#000000	##FFFFFF
##101F5C	1.00	15.30	1.37	15.30
#FFFFFF	15.30	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295E

Deuteranopia (green-blind)

#00225B

Tritanopia (blue-blind)

#002F3A

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #101f5c;
/* rgb */ color: rgb(16, 31, 92);
/* oklch */ color: oklch(27.2% 0.111 267.6);

Tailwind

colors: {
  custom: {
    50: '#5c5a8b',
    500: '#101f5c',
    950: '#000000',
  },
}

SCSS

$custom: #101f5c;
$custom-light: #5c5a8b;
$custom-dark: #000000;

JSON

{
  "hex": "#101f5c",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 92
  },
  "hsl": {
    "h": 228.158,
    "s": 70.37,
    "l": 21.176
  },
  "oklch": {
    "l": 0.2723,
    "c": 0.11066,
    "h": 267.6
  },
  "luminance": 0.01863
}

Semantic roles & 50–950 ramp

primary

#101F5C

secondary

#958233

accent

#CA3BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101F5C

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

Preview Lab → · Contrast checker → · Palette generator →