#10377D#10377D

#10377D is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.6% C 0.127 H 261.1°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#10377D
RGB	rgb(16, 55, 125)
HSL	hsl(219, 77%, 28%)
HSV	hsv(219, 87%, 49%)
CMYK	cmyk(87.2%, 56%, 0%, 51%)
CIE-LAB	lab(24.71, 15.31, -43.41)
CIE-LCH	lch(24.71, 46.03, 289.42°)
OKLab	oklab(35.62% -0.0197 -0.1253)
OKLCH	oklch(35.62% 0.127 261.1)
XYZ	xyz(5.2802, 4.3225, 19.9541)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10377D #7D5610

analogous

#106D7D #10377D #1F107D

triadic

#10377D #7D1037 #377D10

tetradic

#10377D #7D106D #7D5610 #107D1F

square

#10377D #7D106D #7D5610 #107D1F

split-complementary

#10377D #7D1F10 #6D7D10

monochromatic

#030C1B #091F47 #10377D #174FB3 #2469E3

Accessibility & contrast

On white

11.26

#10377D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#10377D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10377D

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10377D	#FFFFFF	#000000	##FFFFFF
##10377D	1.00	11.26	1.86	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00407F

Deuteranopia (green-blind)

#00367C

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #10377d;
/* rgb */ color: rgb(16, 55, 125);
/* oklch */ color: oklch(35.6% 0.127 261.1);

Tailwind

colors: {
  custom: {
    50: '#646da3',
    500: '#10377d',
    950: '#000000',
  },
}

SCSS

$custom: #10377d;
$custom-light: #646da3;
$custom-dark: #000000;

JSON

{
  "hex": "#10377d",
  "rgb": {
    "r": 16,
    "g": 55,
    "b": 125
  },
  "hsl": {
    "h": 218.532,
    "s": 77.305,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35617,
    "c": 0.12685,
    "h": 261.1
  },
  "luminance": 0.04323
}

Semantic roles & 50–950 ramp

primary

#10377D

secondary

#B38635

accent

#AF34F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #10377D

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

Preview Lab → · Contrast checker → · Palette generator →