#1D289F#1D289F

#1D289F is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.6% C 0.187 H 269.2°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#1D289F
RGB	rgb(29, 40, 159)
HSL	hsl(235, 69%, 37%)
HSV	hsv(235, 82%, 62%)
CMYK	cmyk(81.8%, 74.8%, 0%, 37.6%)
CIE-LAB	lab(24.58, 39.75, -64.68)
CIE-LCH	lch(24.58, 75.92, 301.57°)
OKLab	oklab(36.64% -0.0027 -0.1874)
OKLCH	oklch(36.64% 0.187 269.2)
XYZ	xyz(7.5213, 4.2811, 33.2241)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D289F #9F941D

analogous

#1D699F #1D289F #531D9F

triadic

#1D289F #9F1D28 #289F1D

tetradic

#1D289F #9F1D69 #9F941D #1D9F53

square

#1D289F #9F1D69 #9F941D #1D9F53

split-complementary

#1D289F #9F531D #699F1D

monochromatic

#0A0E37 #141B6B #1D289F #2635D3 #5662E0

Accessibility & contrast

On white

11.31

#1D289F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1D289F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D289F

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D289F	#FFFFFF	#000000	##FFFFFF
##1D289F	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041A2

Deuteranopia (green-blind)

#00349D

Tritanopia (blue-blind)

#004B61

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d289f;
/* rgb */ color: rgb(29, 40, 159);
/* oklch */ color: oklch(36.6% 0.187 269.2);

Tailwind

colors: {
  custom: {
    50: '#7263bd',
    500: '#1d289f',
    950: '#000000',
  },
}

SCSS

$custom: #1d289f;
$custom-light: #7263bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1d289f",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 159
  },
  "hsl": {
    "h": 234.923,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36638,
    "c": 0.18742,
    "h": 269.2
  },
  "luminance": 0.04282
}

Semantic roles & 50–950 ramp

primary

#1D289F

secondary

#C4BA54

accent

#DD3CEC

background

#F7F5FB

surface

#EEEAF7

border

#C9C6D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1D289F

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

Preview Lab → · Contrast checker → · Palette generator →