#10174B#10174B

#10174B is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.8% C 0.096 H 271.1°. Best body text is #FFFFFF at 16.85:1 contrast (WCAG AA passes).

Color values

HEX	#10174B
RGB	rgb(16, 23, 75)
HSL	hsl(233, 65%, 18%)
HSV	hsv(233, 79%, 29%)
CMYK	cmyk(78.7%, 69.3%, 0%, 70.6%)
CIE-LAB	lab(10.78, 17.58, -33.17)
CIE-LCH	lch(10.78, 37.54, 297.92°)
OKLab	oklab(23.79% 0.0019 -0.0958)
OKLCH	oklch(23.79% 0.096 271.1)
XYZ	xyz(1.7897, 1.2308, 6.7985)
Luminance	0.0123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10174B #4B4410

analogous

#10344B #10174B #26104B

triadic

#10174B #4B1017 #174B10

tetradic

#10174B #4B1034 #4B4410 #104B26

square

#10174B #4B1034 #4B4410 #104B26

split-complementary

#10174B #4B2610 #344B10

monochromatic

#050819 #050819 #10174B #1B267D #2636B0

Accessibility & contrast

On white

16.85

#10174B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#10174B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10174B

16.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10174B	#FFFFFF	#000000	##FFFFFF
##10174B	1.00	16.85	1.25	16.85
#FFFFFF	16.85	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00204D

Deuteranopia (green-blind)

#001A4A

Tritanopia (blue-blind)

#00242E

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #10174b;
/* rgb */ color: rgb(16, 23, 75);
/* oklch */ color: oklch(23.8% 0.096 271.1);

Tailwind

colors: {
  custom: {
    50: '#58537e',
    500: '#10174b',
    950: '#000000',
  },
}

SCSS

$custom: #10174b;
$custom-light: #58537e;
$custom-dark: #000000;

JSON

{
  "hex": "#10174b",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 75
  },
  "hsl": {
    "h": 232.881,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.23786,
    "c": 0.0958,
    "h": 271.1
  },
  "luminance": 0.01231
}

Semantic roles & 50–950 ramp

primary

#10174B

secondary

#857B32

accent

#D440E8

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04020A

muted

#79787C

Preview Lab

Preview with #10174B

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

Preview Lab → · Contrast checker → · Palette generator →