#1C59B3#1C59B3

#1C59B3 is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.9% C 0.156 H 258.8°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#1C59B3
RGB	rgb(28, 89, 179)
HSL	hsl(216, 73%, 41%)
HSV	hsv(216, 84%, 70%)
CMYK	cmyk(84.4%, 50.3%, 0%, 29.8%)
CIE-LAB	lab(38.98, 15.15, -53.14)
CIE-LCH	lch(38.98, 55.25, 285.92°)
OKLab	oklab(47.87% -0.0303 -0.153)
OKLCH	oklch(47.87% 0.156 258.8)
XYZ	xyz(12.1850, 10.6448, 44.0515)
Luminance	0.1065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C59B3 #B3761C

analogous

#1CA4B3 #1C59B3 #2B1CB3

triadic

#1C59B3 #B31C59 #59B31C

tetradic

#1C59B3 #B31CA4 #B3761C #1CB32B

square

#1C59B3 #B31CA4 #B3761C #1CB32B

split-complementary

#1C59B3 #B32B1C #A4B31C

monochromatic

#0B2449 #143F7E #1C59B3 #2E75DE #6398E7

Accessibility & contrast

On white

6.71

#1C59B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#1C59B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C59B3

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C59B3	#FFFFFF	#000000	##FFFFFF
##1C59B3	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2063B6

Deuteranopia (green-blind)

#0055B1

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #1c59b3;
/* rgb */ color: rgb(28, 89, 179);
/* oklch */ color: oklch(47.9% 0.156 258.8);

Tailwind

colors: {
  custom: {
    50: '#7487ca',
    500: '#1c59b3',
    950: '#000000',
  },
}

SCSS

$custom: #1c59b3;
$custom-light: #7487ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1c59b3",
  "rgb": {
    "r": 28,
    "g": 89,
    "b": 179
  },
  "hsl": {
    "h": 215.762,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.47872,
    "c": 0.15601,
    "h": 258.8
  },
  "luminance": 0.10646
}

Semantic roles & 50–950 ramp

primary

#1C59B3

secondary

#CBA05F

accent

#A638F0

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1C59B3

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

Preview Lab → · Contrast checker → · Palette generator →