#1D59B3#1D59B3

#1D59B3 is a mid, vivid blue. Relative luminance 0.107; OKLCH L 47.9% C 0.156 H 259.0°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#1D59B3
RGB	rgb(29, 89, 179)
HSL	hsl(216, 72%, 41%)
HSV	hsv(216, 84%, 70%)
CMYK	cmyk(83.8%, 50.3%, 0%, 29.8%)
CIE-LAB	lab(39.00, 15.24, -53.09)
CIE-LCH	lch(39.00, 55.24, 286.01°)
OKLab	oklab(47.9% -0.0298 -0.1529)
OKLCH	oklch(47.9% 0.156 259)
XYZ	xyz(12.2128, 10.6591, 44.0528)
Luminance	0.1066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D59B3 #B3771D

analogous

#1DA4B3 #1D59B3 #2C1DB3

triadic

#1D59B3 #B31D59 #59B31D

tetradic

#1D59B3 #B31DA4 #B3771D #1DB32C

square

#1D59B3 #B31DA4 #B3771D #1DB32C

split-complementary

#1D59B3 #B32C1D #A4B31D

monochromatic

#0C254A #143F7E #1D59B3 #3075DD #6498E6

Accessibility & contrast

On white

6.70

#1D59B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#1D59B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D59B3

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D59B3	#FFFFFF	#000000	##FFFFFF
##1D59B3	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2063B6

Deuteranopia (green-blind)

#0056B1

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #1d59b3;
/* rgb */ color: rgb(29, 89, 179);
/* oklch */ color: oklch(47.9% 0.156 259.0);

Tailwind

colors: {
  custom: {
    50: '#7487ca',
    500: '#1d59b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d59b3;
$custom-light: #7487ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d59b3",
  "rgb": {
    "r": 29,
    "g": 89,
    "b": 179
  },
  "hsl": {
    "h": 216,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.47898,
    "c": 0.15578,
    "h": 259
  },
  "luminance": 0.10661
}

Semantic roles & 50–950 ramp

primary

#1D59B3

secondary

#CBA161

accent

#A639EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1D59B3

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

Preview Lab → · Contrast checker → · Palette generator →