#101B4B#101B4B

#101B4B is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.7% C 0.090 H 269.0°. Best body text is #FFFFFF at 16.40:1 contrast (WCAG AA passes).

Color values

HEX	#101B4B
RGB	rgb(16, 27, 75)
HSL	hsl(229, 65%, 18%)
HSV	hsv(229, 79%, 29%)
CMYK	cmyk(78.7%, 64%, 0%, 70.6%)
CIE-LAB	lab(11.97, 14.55, -31.23)
CIE-LCH	lch(11.97, 34.45, 294.98°)
OKLab	oklab(24.67% -0.0016 -0.09)
OKLCH	oklch(24.67% 0.09 269)
XYZ	xyz(1.8752, 1.4018, 6.8270)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B4B #4B4010

analogous

#10384B #101B4B #23104B

triadic

#101B4B #4B101B #1B4B10

tetradic

#101B4B #4B1038 #4B4010 #104B23

square

#101B4B #4B1038 #4B4010 #104B23

split-complementary

#101B4B #4B2310 #384B10

monochromatic

#050919 #050919 #101B4B #1B2D7D #263FB0

Accessibility & contrast

On white

16.40

#101B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#101B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B4B

16.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B4B	#FFFFFF	#000000	##FFFFFF
##101B4B	1.00	16.40	1.28	16.40
#FFFFFF	16.40	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224D

Deuteranopia (green-blind)

#001D4A

Tritanopia (blue-blind)

#00272F

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #101b4b;
/* rgb */ color: rgb(16, 27, 75);
/* oklch */ color: oklch(24.7% 0.090 269.0);

Tailwind

colors: {
  custom: {
    50: '#58577e',
    500: '#101b4b',
    950: '#000000',
  },
}

SCSS

$custom: #101b4b;
$custom-light: #58577e;
$custom-dark: #000000;

JSON

{
  "hex": "#101b4b",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 75
  },
  "hsl": {
    "h": 228.814,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.24667,
    "c": 0.09005,
    "h": 269
  },
  "luminance": 0.01402
}

Semantic roles & 50–950 ramp

primary

#101B4B

secondary

#857532

accent

#C940E8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #101B4B

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

Preview Lab → · Contrast checker → · Palette generator →