True Blue#010FCC

#010FCC is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.9% C 0.260 H 264.3°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

True Blue — editorial page

Color values

HEX	#010FCC
RGB	rgb(1, 15, 204)
HSL	hsl(236, 99%, 40%)
HSV	hsv(236, 100%, 80%)
CMYK	cmyk(99.5%, 92.6%, 0%, 20%)
CIE-LAB	lab(25.88, 63.72, -89.39)
CIE-LCH	lch(25.88, 109.78, 305.48°)
OKLab	oklab(38.92% -0.026 -0.2585)
OKLCH	oklch(38.92% 0.26 264.3)
XYZ	xyz(11.0786, 4.7062, 57.4395)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#010FCC #CCBE01

analogous

#0174CC #010FCC #5801CC

triadic

#010FCC #CC010F #0FCC01

tetradic

#010FCC #CC0174 #CCBE01 #01CC58

square

#010FCC #CC0174 #CCBE01 #01CC58

split-complementary

#010FCC #CC5801 #74CC01

monochromatic

#000652 #010B8F #010FCC #0C1DFE #4956FE

Accessibility & contrast

On white

10.82

#010FCC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#010FCC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #010FCC

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##010FCC	#FFFFFF	#000000	##FFFFFF
##010FCC	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047D1

Deuteranopia (green-blind)

#0032C9

Tritanopia (blue-blind)

#005678

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #010fcc;
/* rgb */ color: rgb(1, 15, 204);
/* oklch */ color: oklch(38.9% 0.260 264.3);

Tailwind

colors: {
  custom: {
    50: '#7c5add',
    500: '#010fcc',
    950: '#000000',
  },
}

SCSS

$custom: #010fcc;
$custom-light: #7c5add;
$custom-dark: #000000;

JSON

{
  "hex": "#010fcc",
  "rgb": {
    "r": 1,
    "g": 15,
    "b": 204
  },
  "hsl": {
    "h": 235.862,
    "s": 99.024,
    "l": 40.196
  },
  "oklch": {
    "l": 0.38925,
    "c": 0.25981,
    "h": 264.3
  },
  "luminance": 0.04708
}

Semantic roles & 50–950 ramp

primary

#010FCC

secondary

#DED44B

accent

#F029FF

background

#F8F5FD

surface

#F0E9FB

border

#CBC5D4

text

#0C0415

muted

#7D7983

Preview Lab

Preview with #010FCC

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

Preview Lab → · Contrast checker → · Palette generator →