#1C59B4#1C59B4

#1C59B4 is a mid, vivid blue. Relative luminance 0.107; OKLCH L 47.9% C 0.157 H 258.9°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#1C59B4
RGB	rgb(28, 89, 180)
HSL	hsl(216, 73%, 41%)
HSV	hsv(216, 84%, 71%)
CMYK	cmyk(84.4%, 50.6%, 0%, 29.4%)
CIE-LAB	lab(39.05, 15.55, -53.61)
CIE-LCH	lch(39.05, 55.82, 286.17°)
OKLab	oklab(47.95% -0.0302 -0.1544)
OKLCH	oklch(47.95% 0.157 258.9)
XYZ	xyz(12.2865, 10.6854, 44.5861)
Luminance	0.1069 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C59B4 #B4771C

analogous

#1CA5B4 #1C59B4 #2B1CB4

triadic

#1C59B4 #B41C59 #59B41C

tetradic

#1C59B4 #B41CA5 #B4771C #1CB42B

square

#1C59B4 #B41CA5 #B4771C #1CB42B

split-complementary

#1C59B4 #B42B1C #A5B41C

monochromatic

#0C254A #143F7F #1C59B4 #2F75DF #6498E7

Accessibility & contrast

On white

6.69

#1C59B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#1C59B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C59B4

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C59B4	#FFFFFF	#000000	##FFFFFF
##1C59B4	1.00	6.69	3.14	6.69
#FFFFFF	6.69	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F63B7

Deuteranopia (green-blind)

#0056B2

Tritanopia (blue-blind)

#006F7E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #1c59b4;
/* rgb */ color: rgb(28, 89, 180);
/* oklch */ color: oklch(47.9% 0.157 258.9);

Tailwind

colors: {
  custom: {
    50: '#7487cb',
    500: '#1c59b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c59b4;
$custom-light: #7487cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c59b4",
  "rgb": {
    "r": 28,
    "g": 89,
    "b": 180
  },
  "hsl": {
    "h": 215.921,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.47948,
    "c": 0.15736,
    "h": 258.9
  },
  "luminance": 0.10687
}

Semantic roles & 50–950 ramp

primary

#1C59B4

secondary

#CCA160

accent

#A638F0

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1C59B4

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

Preview Lab → · Contrast checker → · Palette generator →