#2559B2#2559B2

#2559B2 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.1% C 0.152 H 260.4°. Best body text is #FFFFFF at 6.67:1 contrast (WCAG AA passes).

Color values

HEX	#2559B2
RGB	rgb(37, 89, 178)
HSL	hsl(218, 66%, 42%)
HSV	hsv(218, 79%, 70%)
CMYK	cmyk(79.2%, 50%, 0%, 30.2%)
CIE-LAB	lab(39.16, 15.62, -52.24)
CIE-LCH	lch(39.16, 54.53, 286.65°)
OKLab	oklab(48.06% -0.0253 -0.1503)
OKLCH	oklch(48.06% 0.152 260.4)
XYZ	xyz(12.3683, 10.7510, 43.5341)
Luminance	0.1075 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2559B2 #B27E25

analogous

#25A0B2 #2559B2 #3725B2

triadic

#2559B2 #B22559 #59B225

tetradic

#2559B2 #B225A0 #B27E25 #25B237

square

#2559B2 #B225A0 #B27E25 #25B237

split-complementary

#2559B2 #B23725 #A0B225

monochromatic

#10264D #1A407F #2559B2 #3D76D7 #709AE1

Accessibility & contrast

On white

6.67

#2559B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#2559B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2559B2

6.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2559B2	#FFFFFF	#000000	##FFFFFF
##2559B2	1.00	6.67	3.15	6.67
#FFFFFF	6.67	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2363B5

Deuteranopia (green-blind)

#0056B0

Tritanopia (blue-blind)

#006E7D

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #2559b2;
/* rgb */ color: rgb(37, 89, 178);
/* oklch */ color: oklch(48.1% 0.152 260.4);

Tailwind

colors: {
  custom: {
    50: '#7687ca',
    500: '#2559b2',
    950: '#000000',
  },
}

SCSS

$custom: #2559b2;
$custom-light: #7687ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2559b2",
  "rgb": {
    "r": 37,
    "g": 89,
    "b": 178
  },
  "hsl": {
    "h": 217.872,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.48061,
    "c": 0.15241,
    "h": 260.4
  },
  "luminance": 0.10752
}

Semantic roles & 50–950 ramp

primary

#2559B2

secondary

#C8A66B

accent

#AA3FE9

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #2559B2

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

Preview Lab → · Contrast checker → · Palette generator →