#10398D#10398D

#10398D is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.147 H 262.3°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#10398D
RGB	rgb(16, 57, 141)
HSL	hsl(220, 80%, 31%)
HSV	hsv(220, 89%, 55%)
CMYK	cmyk(88.7%, 59.6%, 0%, 44.7%)
CIE-LAB	lab(26.62, 20.60, -50.30)
CIE-LCH	lch(26.62, 54.35, 292.27°)
OKLab	oklab(37.47% -0.0196 -0.1455)
OKLCH	oklch(37.47% 0.147 262.3)
XYZ	xyz(6.4828, 4.9587, 25.8096)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10398D #8D6410

analogous

#10778D #10398D #25108D

triadic

#10398D #8D1039 #398D10

tetradic

#10398D #8D1077 #8D6410 #108D25

square

#10398D #8D1077 #8D6410 #108D25

split-complementary

#10398D #8D2510 #778D10

monochromatic

#040D1F #0A2356 #10398D #164FC4 #306CE7

Accessibility & contrast

On white

10.54

#10398D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#10398D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10398D

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10398D	#FFFFFF	#000000	##FFFFFF
##10398D	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#00398B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #10398d;
/* rgb */ color: rgb(16, 57, 141);
/* oklch */ color: oklch(37.5% 0.147 262.3);

Tailwind

colors: {
  custom: {
    50: '#696eaf',
    500: '#10398d',
    950: '#000000',
  },
}

SCSS

$custom: #10398d;
$custom-light: #696eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#10398d",
  "rgb": {
    "r": 16,
    "g": 57,
    "b": 141
  },
  "hsl": {
    "h": 220.32,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37473,
    "c": 0.14682,
    "h": 262.3
  },
  "luminance": 0.0496
}

Semantic roles & 50–950 ramp

primary

#10398D

secondary

#C29437

accent

#B632F6

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #10398D

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

Preview Lab → · Contrast checker → · Palette generator →