#10307B#10307B

#10307B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 33.9% C 0.133 H 263.4°. Best body text is #FFFFFF at 12.13:1 contrast (WCAG AA passes).

Color values

HEX	#10307B
RGB	rgb(16, 48, 123)
HSL	hsl(222, 77%, 27%)
HSV	hsv(222, 87%, 48%)
CMYK	cmyk(87%, 61%, 0%, 51.8%)
CIE-LAB	lab(22.49, 19.47, -45.76)
CIE-LCH	lch(22.49, 49.73, 293.05°)
OKLab	oklab(33.89% -0.0152 -0.1323)
OKLCH	oklch(33.89% 0.133 263.4)
XYZ	xyz(4.8445, 3.6535, 19.1849)
Luminance	0.0365 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10307B #7B5B10

analogous

#10667B #10307B #26107B

triadic

#10307B #7B1030 #307B10

tetradic

#10307B #7B1066 #7B5B10 #107B26

square

#10307B #7B1066 #7B5B10 #107B26

split-complementary

#10307B #7B2610 #667B10

monochromatic

#040B1B #091B45 #10307B #1745B1 #235CE2

Accessibility & contrast

On white

12.13

#10307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#10307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10307B

12.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10307B	#FFFFFF	#000000	##FFFFFF
##10307B	1.00	12.13	1.73	12.13
#FFFFFF	12.13	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00317A

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #10307b;
/* rgb */ color: rgb(16, 48, 123);
/* oklch */ color: oklch(33.9% 0.133 263.4);

Tailwind

colors: {
  custom: {
    50: '#6467a2',
    500: '#10307b',
    950: '#000000',
  },
}

SCSS

$custom: #10307b;
$custom-light: #6467a2;
$custom-dark: #000000;

JSON

{
  "hex": "#10307b",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 222.056,
    "s": 76.978,
    "l": 27.255
  },
  "oklch": {
    "l": 0.33889,
    "c": 0.13321,
    "h": 263.4
  },
  "luminance": 0.03654
}

Semantic roles & 50–950 ramp

primary

#10307B

secondary

#B28C35

accent

#BA34F4

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#06060F

muted

#7A7A7F

Preview Lab

Preview with #10307B

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

Preview Lab → · Contrast checker → · Palette generator →