#103A8D#103A8D

#103A8D is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.146 H 262.0°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#103A8D
RGB	rgb(16, 58, 141)
HSL	hsl(220, 80%, 31%)
HSV	hsv(220, 89%, 55%)
CMYK	cmyk(88.7%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(26.90, 19.89, -49.84)
CIE-LCH	lch(26.90, 53.66, 291.76°)
OKLab	oklab(37.69% -0.0202 -0.1441)
OKLCH	oklch(37.69% 0.146 262)
XYZ	xyz(6.5327, 5.0585, 25.8262)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#103A8D #8D6310

analogous

#10788D #103A8D #24108D

triadic

#103A8D #8D103A #3A8D10

tetradic

#103A8D #8D1078 #8D6310 #108D24

square

#103A8D #8D1078 #8D6310 #108D24

split-complementary

#103A8D #8D2410 #788D10

monochromatic

#040D1F #0A2356 #103A8D #1651C4 #306EE7

Accessibility & contrast

On white

10.44

#103A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#103A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #103A8D

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##103A8D	#FFFFFF	#000000	##FFFFFF
##103A8D	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#003A8B

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #103a8d;
/* rgb */ color: rgb(16, 58, 141);
/* oklch */ color: oklch(37.7% 0.146 262.0);

Tailwind

colors: {
  custom: {
    50: '#686faf',
    500: '#103a8d',
    950: '#000000',
  },
}

SCSS

$custom: #103a8d;
$custom-light: #686faf;
$custom-dark: #000000;

JSON

{
  "hex": "#103a8d",
  "rgb": {
    "r": 16,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 219.84,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37687,
    "c": 0.14553,
    "h": 262
  },
  "luminance": 0.05059
}

Semantic roles & 50–950 ramp

primary

#103A8D

secondary

#C29337

accent

#B432F6

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #103A8D

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

Preview Lab → · Contrast checker → · Palette generator →