#1D539F#1D539F

#1D539F is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.1% C 0.136 H 257.9°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#1D539F
RGB	rgb(29, 83, 159)
HSL	hsl(215, 69%, 37%)
HSV	hsv(215, 82%, 62%)
CMYK	cmyk(81.8%, 47.8%, 0%, 37.6%)
CIE-LAB	lab(35.89, 11.25, -46.23)
CIE-LCH	lch(35.89, 47.58, 283.68°)
OKLab	oklab(45.07% -0.0285 -0.1328)
OKLCH	oklch(45.07% 0.136 257.9)
XYZ	xyz(9.8557, 8.9497, 34.0022)
Luminance	0.0895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D539F #9F691D

analogous

#1D949F #1D539F #281D9F

triadic

#1D539F #9F1D53 #539F1D

tetradic

#1D539F #9F1D94 #9F691D #1D9F28

square

#1D539F #9F1D94 #9F691D #1D9F28

split-complementary

#1D539F #9F281D #949F1D

monochromatic

#0A1D37 #14386B #1D539F #266ED3 #5690E0

Accessibility & contrast

On white

7.53

#1D539F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1D539F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D539F

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D539F	#FFFFFF	#000000	##FFFFFF
##1D539F	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#295BA2

Deuteranopia (green-blind)

#004F9D

Tritanopia (blue-blind)

#006571

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1d539f;
/* rgb */ color: rgb(29, 83, 159);
/* oklch */ color: oklch(45.1% 0.136 257.9);

Tailwind

colors: {
  custom: {
    50: '#6f82bc',
    500: '#1d539f',
    950: '#000000',
  },
}

SCSS

$custom: #1d539f;
$custom-light: #6f82bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1d539f",
  "rgb": {
    "r": 29,
    "g": 83,
    "b": 159
  },
  "hsl": {
    "h": 215.077,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.45068,
    "c": 0.13583,
    "h": 257.9
  },
  "luminance": 0.08951
}

Semantic roles & 50–950 ramp

primary

#1D539F

secondary

#C49554

accent

#A33CEC

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1D539F

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

Preview Lab → · Contrast checker → · Palette generator →