#10255B#10255B

#10255B is a dark, moderate blue. Relative luminance 0.022; OKLCH L 28.5% C 0.101 H 264.7°. Best body text is #FFFFFF at 14.61:1 contrast (WCAG AA passes).

Color values

HEX	#10255B
RGB	rgb(16, 37, 91)
HSL	hsl(223, 70%, 21%)
HSV	hsv(223, 82%, 36%)
CMYK	cmyk(82.4%, 59.3%, 0%, 64.3%)
CIE-LAB	lab(16.45, 13.88, -34.81)
CIE-LCH	lch(16.45, 37.48, 291.75°)
OKLab	oklab(28.47% -0.0094 -0.1004)
OKLCH	oklch(28.47% 0.101 264.7)
XYZ	xyz(2.7629, 2.1883, 10.1723)
Luminance	0.0219 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10255B #5B4610

analogous

#104A5B #10255B #20105B

triadic

#10255B #5B1025 #255B10

tetradic

#10255B #5B104A #5B4610 #105B20

square

#10255B #5B104A #5B4610 #105B20

split-complementary

#10255B #5B2010 #4A5B10

monochromatic

#050B1A #071027 #10255B #193A8F #224FC3

Accessibility & contrast

On white

14.61

#10255B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#10255B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10255B

14.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10255B	#FFFFFF	#000000	##FFFFFF
##10255B	1.00	14.61	1.44	14.61
#FFFFFF	14.61	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C5D

Deuteranopia (green-blind)

#00255A

Tritanopia (blue-blind)

#00323C

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #10255b;
/* rgb */ color: rgb(16, 37, 91);
/* oklch */ color: oklch(28.5% 0.101 264.7);

Tailwind

colors: {
  custom: {
    50: '#5c5f8a',
    500: '#10255b',
    950: '#000000',
  },
}

SCSS

$custom: #10255b;
$custom-light: #5c5f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#10255b",
  "rgb": {
    "r": 16,
    "g": 37,
    "b": 91
  },
  "hsl": {
    "h": 223.2,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.28471,
    "c": 0.10082,
    "h": 264.7
  },
  "luminance": 0.02189
}

Semantic roles & 50–950 ramp

primary

#10255B

secondary

#947933

accent

#BB3BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#04040C

muted

#79797D

Preview Lab

Preview with #10255B

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

Preview Lab → · Contrast checker → · Palette generator →