#101B57#101B57

#101B57 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.109 H 269.1°. Best body text is #FFFFFF at 15.95:1 contrast (WCAG AA passes).

Color values

HEX	#101B57
RGB	rgb(16, 27, 87)
HSL	hsl(231, 69%, 20%)
HSV	hsv(231, 82%, 34%)
CMYK	cmyk(81.6%, 69%, 0%, 65.9%)
CIE-LAB	lab(13.12, 19.63, -37.55)
CIE-LCH	lch(13.12, 42.37, 297.61°)
OKLab	oklab(25.88% -0.0017 -0.1086)
OKLCH	oklch(25.88% 0.109 269.1)
XYZ	xyz(2.3253, 1.5819, 9.1978)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B57 #574C10

analogous

#103F57 #101B57 #281057

triadic

#101B57 #57101B #1B5710

tetradic

#101B57 #57103F #574C10 #105728

square

#101B57 #57103F #574C10 #105728

split-complementary

#101B57 #572810 #3F5710

monochromatic

#05081A #060B23 #101B57 #1A2B8B #233BBE

Accessibility & contrast

On white

15.95

#101B57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#101B57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B57

15.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B57	#FFFFFF	#000000	##FFFFFF
##101B57	1.00	15.95	1.32	15.95
#FFFFFF	15.95	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002559

Deuteranopia (green-blind)

#001F56

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #101b57;
/* rgb */ color: rgb(16, 27, 87);
/* oklch */ color: oklch(25.9% 0.109 269.1);

Tailwind

colors: {
  custom: {
    50: '#5b5787',
    500: '#101b57',
    950: '#000000',
  },
}

SCSS

$custom: #101b57;
$custom-light: #5b5787;
$custom-dark: #000000;

JSON

{
  "hex": "#101b57",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 87
  },
  "hsl": {
    "h": 230.704,
    "s": 68.932,
    "l": 20.196
  },
  "oklch": {
    "l": 0.25876,
    "c": 0.10859,
    "h": 269.1
  },
  "luminance": 0.01582
}

Semantic roles & 50–950 ramp

primary

#101B57

secondary

#908232

accent

#D13CEC

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030B

muted

#79787C

Preview Lab

Preview with #101B57

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

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