#10397D#10397D

#10397D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.1% C 0.124 H 260.2°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#10397D
RGB	rgb(16, 57, 125)
HSL	hsl(217, 77%, 28%)
HSV	hsv(217, 87%, 49%)
CMYK	cmyk(87.2%, 54.4%, 0%, 51%)
CIE-LAB	lab(25.31, 13.88, -42.44)
CIE-LCH	lch(25.31, 44.65, 288.11°)
OKLab	oklab(36.07% -0.0211 -0.1224)
OKLCH	oklch(36.07% 0.124 260.2)
XYZ	xyz(5.3771, 4.5164, 19.9864)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10397D #7D5410

analogous

#10707D #10397D #1D107D

triadic

#10397D #7D1039 #397D10

tetradic

#10397D #7D1070 #7D5410 #107D1D

square

#10397D #7D1070 #7D5410 #107D1D

split-complementary

#10397D #7D1D10 #707D10

monochromatic

#030C1B #092047 #10397D #1752B3 #246CE3

Accessibility & contrast

On white

11.03

#10397D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#10397D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10397D

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10397D	#FFFFFF	#000000	##FFFFFF
##10397D	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06417F

Deuteranopia (green-blind)

#00377C

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #10397d;
/* rgb */ color: rgb(16, 57, 125);
/* oklch */ color: oklch(36.1% 0.124 260.2);

Tailwind

colors: {
  custom: {
    50: '#646ea3',
    500: '#10397d',
    950: '#000000',
  },
}

SCSS

$custom: #10397d;
$custom-light: #646ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#10397d",
  "rgb": {
    "r": 16,
    "g": 57,
    "b": 125
  },
  "hsl": {
    "h": 217.431,
    "s": 77.305,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36073,
    "c": 0.12421,
    "h": 260.2
  },
  "luminance": 0.04517
}

Semantic roles & 50–950 ramp

primary

#10397D

secondary

#B38435

accent

#AC34F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #10397D

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

Preview Lab → · Contrast checker → · Palette generator →