#10397F#10397F

#10397F is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.2% C 0.127 H 260.5°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).

Color values

HEX	#10397F
RGB	rgb(16, 57, 127)
HSL	hsl(218, 78%, 28%)
HSV	hsv(218, 87%, 50%)
CMYK	cmyk(87.4%, 55.1%, 0%, 50.2%)
CIE-LAB	lab(25.47, 14.73, -43.44)
CIE-LCH	lch(25.47, 45.87, 288.73°)
OKLab	oklab(36.24% -0.0209 -0.1253)
OKLCH	oklch(36.24% 0.127 260.5)
XYZ	xyz(5.5062, 4.5680, 20.6661)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10397F #7F5610

analogous

#10707F #10397F #1F107F

triadic

#10397F #7F1039 #397F10

tetradic

#10397F #7F1070 #7F5610 #107F1F

square

#10397F #7F1070 #7F5610 #107F1F

split-complementary

#10397F #7F1F10 #707F10

monochromatic

#030C1B #092149 #10397F #1751B5 #266CE4

Accessibility & contrast

On white

10.97

#10397F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#10397F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10397F

10.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10397F	#FFFFFF	#000000	##FFFFFF
##10397F	1.00	10.97	1.91	10.97
#FFFFFF	10.97	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014281

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #10397f;
/* rgb */ color: rgb(16, 57, 127);
/* oklch */ color: oklch(36.2% 0.127 260.5);

Tailwind

colors: {
  custom: {
    50: '#656ea5',
    500: '#10397f',
    950: '#000000',
  },
}

SCSS

$custom: #10397f;
$custom-light: #656ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#10397f",
  "rgb": {
    "r": 16,
    "g": 57,
    "b": 127
  },
  "hsl": {
    "h": 217.838,
    "s": 77.622,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36243,
    "c": 0.12708,
    "h": 260.5
  },
  "luminance": 0.04569
}

Semantic roles & 50–950 ramp

primary

#10397F

secondary

#B58636

accent

#AD34F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #10397F

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

Preview Lab → · Contrast checker → · Palette generator →