#100D58#100D58

#100D58 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.5% C 0.127 H 272.6°. Best body text is #FFFFFF at 17.20:1 contrast (WCAG AA passes).

Color values

HEX	#100D58
RGB	rgb(16, 13, 88)
HSL	hsl(242, 74%, 20%)
HSV	hsv(242, 85%, 35%)
CMYK	cmyk(81.8%, 85.2%, 0%, 65.5%)
CIE-LAB	lab(9.82, 29.43, -43.67)
CIE-LCH	lch(9.82, 52.66, 303.98°)
OKLab	oklab(23.54% 0.0058 -0.1264)
OKLCH	oklch(23.54% 0.127 272.6)
XYZ	xyz(2.1185, 1.1024, 9.3318)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D58 #55580D

analogous

#0D3058 #100D58 #360D58

triadic

#100D58 #58100D #0D5810

tetradic

#100D58 #580D30 #55580D #0D5836

square

#100D58 #580D30 #55580D #0D5836

split-complementary

#100D58 #58360D #30580D

monochromatic

#05041B #060523 #100D58 #1A158D #231DC3

Accessibility & contrast

On white

17.20

#100D58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#100D58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D58

17.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D58	#FFFFFF	#000000	##FFFFFF
##100D58	1.00	17.20	1.22	17.20
#FFFFFF	17.20	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F5A

Deuteranopia (green-blind)

#001757

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #100d58;
/* rgb */ color: rgb(16, 13, 88);
/* oklch */ color: oklch(23.5% 0.127 272.6);

Tailwind

colors: {
  custom: {
    50: '#5d4d88',
    500: '#100d58',
    950: '#000000',
  },
}

SCSS

$custom: #100d58;
$custom-light: #5d4d88;
$custom-dark: #000000;

JSON

{
  "hex": "#100d58",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 88
  },
  "hsl": {
    "h": 242.4,
    "s": 74.257,
    "l": 19.804
  },
  "oklch": {
    "l": 0.23537,
    "c": 0.1265,
    "h": 272.6
  },
  "luminance": 0.01103
}

Semantic roles & 50–950 ramp

primary

#100D58

secondary

#8F932E

accent

#F137E9

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05010B

muted

#79777C

Preview Lab

Preview with #100D58

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

Preview Lab → · Contrast checker → · Palette generator →