#10377E#10377E

#10377E is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.128 H 261.2°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#10377E
RGB	rgb(16, 55, 126)
HSL	hsl(219, 77%, 28%)
HSV	hsv(219, 87%, 49%)
CMYK	cmyk(87.3%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(24.79, 15.73, -43.91)
CIE-LCH	lch(24.79, 46.64, 289.71°)
OKLab	oklab(35.7% -0.0196 -0.1268)
OKLCH	oklch(35.7% 0.128 261.2)
XYZ	xyz(5.3444, 4.3482, 20.2922)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10377E #7E5710

analogous

#106E7E #10377E #20107E

triadic

#10377E #7E1037 #377E10

tetradic

#10377E #7E106E #7E5710 #107E20

square

#10377E #7E106E #7E5710 #107E20

split-complementary

#10377E #7E2010 #6E7E10

monochromatic

#030C1B #091F48 #10377E #174FB4 #2569E3

Accessibility & contrast

On white

11.23

#10377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#10377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10377E

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10377E	#FFFFFF	#000000	##FFFFFF
##10377E	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004080

Deuteranopia (green-blind)

#00367D

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #10377e;
/* rgb */ color: rgb(16, 55, 126);
/* oklch */ color: oklch(35.7% 0.128 261.2);

Tailwind

colors: {
  custom: {
    50: '#646da4',
    500: '#10377e',
    950: '#000000',
  },
}

SCSS

$custom: #10377e;
$custom-light: #646da4;
$custom-dark: #000000;

JSON

{
  "hex": "#10377e",
  "rgb": {
    "r": 16,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 218.727,
    "s": 77.465,
    "l": 27.843
  },
  "oklch": {
    "l": 0.35703,
    "c": 0.12827,
    "h": 261.2
  },
  "luminance": 0.04349
}

Semantic roles & 50–950 ramp

primary

#10377E

secondary

#B48736

accent

#B034F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #10377E

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

Preview Lab → · Contrast checker → · Palette generator →