#10257E#10257E

#10257E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.0% C 0.151 H 266.4°. Best body text is #FFFFFF at 13.22:1 contrast (WCAG AA passes).

Color values

HEX	#10257E
RGB	rgb(16, 37, 126)
HSL	hsl(229, 77%, 28%)
HSV	hsv(229, 87%, 49%)
CMYK	cmyk(87.3%, 70.6%, 0%, 50.6%)
CIE-LAB	lab(19.80, 28.43, -52.08)
CIE-LCH	lch(19.80, 59.33, 298.63°)
OKLab	oklab(31.99% -0.0095 -0.1509)
OKLCH	oklch(31.99% 0.151 266.4)
XYZ	xyz(4.6398, 2.9391, 20.0574)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10257E #7E6910

analogous

#105C7E #10257E #32107E

triadic

#10257E #7E1025 #257E10

tetradic

#10257E #7E105C #7E6910 #107E32

square

#10257E #7E105C #7E6910 #107E32

split-complementary

#10257E #7E3210 #5C7E10

monochromatic

#03081B #091548 #10257E #1735B4 #2549E3

Accessibility & contrast

On white

13.22

#10257E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#10257E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10257E

13.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10257E	#FFFFFF	#000000	##FFFFFF
##10257E	1.00	13.22	1.59	13.22
#FFFFFF	13.22	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003581

Deuteranopia (green-blind)

#002B7C

Tritanopia (blue-blind)

#003E4E

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #10257e;
/* rgb */ color: rgb(16, 37, 126);
/* oklch */ color: oklch(32.0% 0.151 266.4);

Tailwind

colors: {
  custom: {
    50: '#665fa4',
    500: '#10257e',
    950: '#000000',
  },
}

SCSS

$custom: #10257e;
$custom-light: #665fa4;
$custom-dark: #000000;

JSON

{
  "hex": "#10257e",
  "rgb": {
    "r": 16,
    "g": 37,
    "b": 126
  },
  "hsl": {
    "h": 228.545,
    "s": 77.465,
    "l": 27.843
  },
  "oklch": {
    "l": 0.31985,
    "c": 0.15125,
    "h": 266.4
  },
  "luminance": 0.0294
}

Semantic roles & 50–950 ramp

primary

#10257E

secondary

#B49C36

accent

#CF34F4

background

#F6F5FA

surface

#EBE9F4

border

#C6C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #10257E

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

Preview Lab → · Contrast checker → · Palette generator →