#10307E#10307E

#10307E is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.2% C 0.137 H 263.7°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#10307E
RGB	rgb(16, 48, 126)
HSL	hsl(223, 77%, 28%)
HSV	hsv(223, 87%, 49%)
CMYK	cmyk(87.3%, 61.9%, 0%, 50.6%)
CIE-LAB	lab(22.76, 20.73, -47.22)
CIE-LCH	lch(22.76, 51.57, 293.70°)
OKLab	oklab(34.17% -0.0151 -0.1366)
OKLCH	oklch(34.17% 0.137 263.7)
XYZ	xyz(5.0352, 3.7298, 20.1892)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10307E #7E5E10

analogous

#10677E #10307E #27107E

triadic

#10307E #7E1030 #307E10

tetradic

#10307E #7E1067 #7E5E10 #107E27

square

#10307E #7E1067 #7E5E10 #107E27

split-complementary

#10307E #7E2710 #677E10

monochromatic

#030A1B #091B48 #10307E #1745B4 #255CE3

Accessibility & contrast

On white

12.03

#10307E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#10307E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10307E

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10307E	#FFFFFF	#000000	##FFFFFF
##10307E	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C81

Deuteranopia (green-blind)

#00317D

Tritanopia (blue-blind)

#004452

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #10307e;
/* rgb */ color: rgb(16, 48, 126);
/* oklch */ color: oklch(34.2% 0.137 263.7);

Tailwind

colors: {
  custom: {
    50: '#6567a4',
    500: '#10307e',
    950: '#000000',
  },
}

SCSS

$custom: #10307e;
$custom-light: #6567a4;
$custom-dark: #000000;

JSON

{
  "hex": "#10307e",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 126
  },
  "hsl": {
    "h": 222.545,
    "s": 77.465,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34171,
    "c": 0.13747,
    "h": 263.7
  },
  "luminance": 0.0373
}

Semantic roles & 50–950 ramp

primary

#10307E

secondary

#B48F36

accent

#BC34F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #10307E

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

Preview Lab → · Contrast checker → · Palette generator →