#10237E#10237E

#10237E is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.154 H 266.8°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#10237E
RGB	rgb(16, 35, 126)
HSL	hsl(230, 77%, 28%)
HSV	hsv(230, 87%, 49%)
CMYK	cmyk(87.3%, 72.2%, 0%, 50.6%)
CIE-LAB	lab(19.30, 29.78, -52.90)
CIE-LCH	lch(19.30, 60.71, 299.38°)
OKLab	oklab(31.62% -0.0086 -0.1533)
OKLCH	oklch(31.62% 0.154 266.8)
XYZ	xyz(4.5793, 2.8180, 20.0372)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10237E #7E6B10

analogous

#105A7E #10237E #34107E

triadic

#10237E #7E1023 #237E10

tetradic

#10237E #7E105A #7E6B10 #107E34

square

#10237E #7E105A #7E6B10 #107E34

split-complementary

#10237E #7E3410 #5A7E10

monochromatic

#03081B #091448 #10237E #1732B4 #2546E3

Accessibility & contrast

On white

13.43

#10237E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#10237E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10237E

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10237E	#FFFFFF	#000000	##FFFFFF
##10237E	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003481

Deuteranopia (green-blind)

#00297C

Tritanopia (blue-blind)

#003D4D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #10237e;
/* rgb */ color: rgb(16, 35, 126);
/* oklch */ color: oklch(31.6% 0.154 266.8);

Tailwind

colors: {
  custom: {
    50: '#665ea4',
    500: '#10237e',
    950: '#000000',
  },
}

SCSS

$custom: #10237e;
$custom-light: #665ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#10237e",
  "rgb": {
    "r": 16,
    "g": 35,
    "b": 126
  },
  "hsl": {
    "h": 229.636,
    "s": 77.465,
    "l": 27.843
  },
  "oklch": {
    "l": 0.31623,
    "c": 0.15358,
    "h": 266.8
  },
  "luminance": 0.02819
}

Semantic roles & 50–950 ramp

primary

#10237E

secondary

#B49E36

accent

#D334F4

background

#F6F5FA

surface

#EBE9F4

border

#C6C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #10237E

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

Preview Lab → · Contrast checker → · Palette generator →