#101C5B#101C5B

#101C5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.113 H 268.7°. Best body text is #FFFFFF at 15.68:1 contrast (WCAG AA passes).

Color values

HEX	#101C5B
RGB	rgb(16, 28, 91)
HSL	hsl(230, 70%, 21%)
HSV	hsv(230, 82%, 36%)
CMYK	cmyk(82.4%, 69.2%, 0%, 64.3%)
CIE-LAB	lab(13.80, 20.57, -39.12)
CIE-LCH	lch(13.80, 44.20, 297.73°)
OKLab	oklab(26.5% -0.0026 -0.1132)
OKLCH	oklch(26.5% 0.113 268.7)
XYZ	xyz(2.5166, 1.6957, 10.0902)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101C5B #5B4F10

analogous

#10415B #101C5B #29105B

triadic

#101C5B #5B101C #1C5B10

tetradic

#101C5B #5B1041 #5B4F10 #105B29

square

#101C5B #5B1041 #5B4F10 #105B29

split-complementary

#101C5B #5B2910 #415B10

monochromatic

#05081A #070C27 #101C5B #192C8F #223CC3

Accessibility & contrast

On white

15.68

#101C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#101C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101C5B

15.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101C5B	#FFFFFF	#000000	##FFFFFF
##101C5B	1.00	15.68	1.34	15.68
#FFFFFF	15.68	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002D38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #101c5b;
/* rgb */ color: rgb(16, 28, 91);
/* oklch */ color: oklch(26.5% 0.113 268.7);

Tailwind

colors: {
  custom: {
    50: '#5c588a',
    500: '#101c5b',
    950: '#000000',
  },
}

SCSS

$custom: #101c5b;
$custom-light: #5c588a;
$custom-dark: #000000;

JSON

{
  "hex": "#101c5b",
  "rgb": {
    "r": 16,
    "g": 28,
    "b": 91
  },
  "hsl": {
    "h": 230.4,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26501,
    "c": 0.11321,
    "h": 268.7
  },
  "luminance": 0.01696
}

Semantic roles & 50–950 ramp

primary

#101C5B

secondary

#948533

accent

#D03BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101C5B

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

Preview Lab → · Contrast checker → · Palette generator →