#101D5B#101D5B

#101D5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.7% C 0.112 H 268.3°. Best body text is #FFFFFF at 15.57:1 contrast (WCAG AA passes).

Color values

HEX	#101D5B
RGB	rgb(16, 29, 91)
HSL	hsl(230, 70%, 21%)
HSV	hsv(230, 82%, 36%)
CMYK	cmyk(82.4%, 68.1%, 0%, 64.3%)
CIE-LAB	lab(14.08, 19.84, -38.67)
CIE-LCH	lch(14.08, 43.46, 297.16°)
OKLab	oklab(26.71% -0.0033 -0.1118)
OKLCH	oklch(26.71% 0.112 268.3)
XYZ	xyz(2.5407, 1.7439, 10.0982)
Luminance	0.0174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101D5B #5B4E10

analogous

#10425B #101D5B #28105B

triadic

#101D5B #5B101D #1D5B10

tetradic

#101D5B #5B1042 #5B4E10 #105B28

square

#101D5B #5B1042 #5B4E10 #105B28

split-complementary

#101D5B #5B2810 #425B10

monochromatic

#05081A #070C27 #101D5B #192E8F #223EC3

Accessibility & contrast

On white

15.57

#101D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#101D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101D5B

15.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101D5B	#FFFFFF	#000000	##FFFFFF
##101D5B	1.00	15.57	1.35	15.57
#FFFFFF	15.57	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #101d5b;
/* rgb */ color: rgb(16, 29, 91);
/* oklch */ color: oklch(26.7% 0.112 268.3);

Tailwind

colors: {
  custom: {
    50: '#5c588a',
    500: '#101d5b',
    950: '#000000',
  },
}

SCSS

$custom: #101d5b;
$custom-light: #5c588a;
$custom-dark: #000000;

JSON

{
  "hex": "#101d5b",
  "rgb": {
    "r": 16,
    "g": 29,
    "b": 91
  },
  "hsl": {
    "h": 229.6,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26707,
    "c": 0.11187,
    "h": 268.3
  },
  "luminance": 0.01744
}

Semantic roles & 50–950 ramp

primary

#101D5B

secondary

#948333

accent

#CE3BED

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #101D5B

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

Preview Lab → · Contrast checker → · Palette generator →